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Cited by 9biodegradable polymer synthesis and propertiesPolymer crystallization and propertiesBlock Copolymer Self-Assembly

Poly(L‐lactide)‐b‐poly(ε‐caprolactone)‐b‐poly(D,L‐lactide) copolymers with enhanced toughness and strength by regulating crystallization and phase separation

Open access
Chen, Yipeng, Zhang, Jiangang, Zhang, Yuesheng, Cao, Wen, Liu, Xiong, Bao, Jianna, Zhang, Xianming, Chen, Wenxing·2023·Journal of Polymer Science
DOI 10.1002/pol.20230425
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Abstract

Copolymerizing poly(lactide) with other materials to obtain better comprehensive performance is a effective way to expand its application range. In this work, the precursors of hydroxyl terminated (poly(L‐lactide) [PLLA], poly(ε‐caprolactone) [PCL], poly(D,L‐lactide) [PDLLA]) were prepared, and PLLA‐PCL‐PDLLA copolymer were synthesized by chain extension. The effects of the proportion and molecular weight of each component and the amount of chain extender on crystallization, phase structures, mechanical properties and thermal stabilities of PLLA‐PCL‐PDLLA copolymer were studied in detail. Based on small‐angle X‐ray scattering results, the competition between crystallization and microphase separation was regulated by the composition and chain length of prepolymers. As the ratio of PLLA/PDLLA was 1:1, crystallization was prevailing and no obvious peak was observed in SAXS pattern. The tensile test results showed that as the ratio of PLLA/PDLLA increased from 1:1 to 1:5, the elongation at break of the copolymer changed from 1.8% to 343%. By using shorter length of PCL and PLLA segments in chain extension, improvement in strength and flexibility were obtained due to moderate degree of crystallization and microphase separation. This work used biodegradable materials to prepare extraordinary toughness copolymers without losing the biocompatibility, which may provide a feasible method for obtaining high toughness and biodegradable PLA‐based materials.

Integrity signals

Registry

Crossref · 10.1002/pol.20230425

Cites

44 of 44 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 11 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    The increase of chain extender and the decrease of the molecular weight of prepolymer led to the disappearance of the melting peak of LA-CL-DL block copolymer in the second DSC heating curve.

    “As seen in the second DSC heating curve of block copolymer after chain extension reaction (Figure 4D), the increase of chain extender and the decrease of the molecular weight of prepolymer led to the disappearance of the melting peak of LA-CL-DL block copolymer.”
    Quote in the paperNot a substantial claim
  • Findingown data

    Based on SAXS results, the competition between crystallization and microphase separation was regulated by the composition and chain length of prepolymers.

    “Based on small-angle X-ray scattering results, the competition between crystallization and microphase separation was regulated by the composition and chain length of prepolymers.”
    Quote in the paperSubstantial claim
  • Findingnone given

    With the increase of the ratio of PDLLA/PLLA, the melting point of LA-CL-DL block copolymer gradually decreased.

    “Obviously, with the increase of the ratio of PDLLA/PLLA, the melting point of LA-CL-DL block copolymer gradually decreased.”
    Quote in the paperSubstantial claim
  • Findingown data

    The addition of HDI achieved the expected chain extension effect.

    “This result showed that the addition of HDI achieved the expected chain extension effect.”
    Quote in the paperSubstantial claim
  • Findingown data

    As the ratio of PLLA/PDLLA increased from 1:1 to 1:5, the elongation at break of the copolymer changed from 1.8% to 343%.

    “The tensile test results showed that as the ratio of PLLA/PDLLA increased from 1:1 to 1:5, the elongation at break of the copolymer changed from 1.8% to 343%.”
    Quote in the paperSubstantial claim
  • May combine two claims. 38
  • Classified as probably not a substantial claim. 10

  • May combine two claims.

    Findingown data

    As the ratio of PLLA/PDLLA was 1:1, crystallization was prevailing and no obvious peak was observed in the SAXS pattern.

    “As the ratio of PLLA/PDLLA was 1:1, crystallization was prevailing and no obvious peak was observed in SAXS pattern.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    As the proportion of PDLLA gradually increased, the crystallization peak intensity of LA-CL-DL-2 began to weaken, and completely disappeared in the remaining copolymers.

    “However, as the proportion of PDLLA gradually increased, the crystallization peak intensity of LA-CL-DL-2 began to weaken, and completely disappeared in the remaining copolymers.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    PDLLA did not show obvious crystallization and melting peaks, indicating that it was amorphous.

    “The DSC heating curve of PDLLA did not show obvious crystallization and melting peaks, indicating that it was amorphous.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingreasoning

    Some GPC curves exhibited bimodal phenomena, which may be due to uneven chain extension reactions with a wider molecular weight distribution.

    “Some curves exhibited bimodal phenomena, which may be due to uneven chain extension reactions with a wider molecular weight distribution.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    LA-CL-DL-1 exhibited an Mn of 25.9 kg/mol, which was higher than that of PLA (8.1 kg/mol), PCL (6.5 kg/mol) and PDLLA (10.7 kg/mol) before reaction.

    “LA-CL-DL-1 exhibited an M n of 25.9 kg/mol, which was higher than that of PLA (8.1 kg/mol), PCL (6.5 kg/mol) and PDLLA (10.7 kg/mol) before reaction.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    A new signal attributing to the COONH was observed at 3.20 ppm, demonstrating that the NCO in HDI was reacted with the terminal hydroxyl group in the prepolymer.

    “In the spectrum of LA-CL-DL, besides signals possessed by the precursor, a new signal attributing to the COONH was observed at 3.20 ppm, demonstrating that the NCO in HDI was reacted with the terminal hydroxyl group in the prepolymer.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    The characteristic resonance peaks in 1H NMR were highly consistent with previous literature, indicative of the successful synthesis of prepolymers.

    “These results were highly consistent with previous literature, indicative of the successful synthesis of prepolymers.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingnone given

    When using low molecular weight prepolymer, the melting peak of PCL in the DSC image disappeared, indicating that low molecular weight prepolymer was more conducive to the chain reaction.

    “When using low molecular weight prepolymer, the melting peak of PCL in DSC image disappeared, indicating that low molecular weight prepolymer was more conducive to the chain reaction.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    The first stage with the highest decomposition temperature of about 235 C was the degradation of PLLA and PDLLA, and the second stage degradation at more than 280 C belonged to the thermal degradation of PCL.

    “The first stage with the highest decomposition temperature of about 235 C was the degradation of PLLA and PDLLA, and subsequent the second stage degradation at more than 280 C belonged to the thermal degradation of PCL.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingreasoning

    The decrease of molecular weight and excessive chain extender increased the tensile stress and Young's modulus of the copolymer, which was inconsistent with the previous rule.

    “The decrease of molecular weight and excessive chain extender were found to the increase of tensile stress and Young's modulus of the copolymer, which were inconsistent with the previous rule.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    As the ratio was changed to 1:5, the sample became amorphous, and there was an obvious microphase separation structure, which played a role in mechanical enhancement.

    “As the ratio was changed to 1:5, the sample became amorphous, and there was an obvious microphase separation structure, which played a role in mechanical enhancement.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Microphase separation can improve tensile strength or elongation to varying degrees.

  • May combine two claims.

    Findingown data

    LA-CL-DL-4 and LA-CL-DL-7 showed relatively weaker WAXD peaks at 2θ = 11.7 and 13.5, and SAXS peaks at q* = 0.13 and 0.14 nm^-1, corresponding to D of 48.3 and 44.9 nm.

    “Accompanying with relative weaker peaks in WAXD curves at 2θ = 11.7 and 13.5 , a scattering peak at q* = 0.13 and 0.14 nm À1 was presented for LA-CL-DL-4 and LA-CL-DL-7, corresponding to D of 48.3 and 44.9 nm.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    The transparency of the films with different molecular weights gradually increased with the increase of PDLLA content, while transparency was maximized by samples LA-CL-DL-3 and LA-CL-DL-7.

    “The transparency of the films with different molecular weights gradually increased with the increase of PDLLA content, while transparency was maximized by samples LA-CL-DL-3 and LA-CL-DL-7.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    All spline curves had obvious deformation recovery ability after stretching, indicative of elastic deformation during stretching.

    “All spline curves had obvious deformation recovery ability after stretching, indicative of the elastic deformation during stretching.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Findingown data

    LA-CL-DL-3 showed no peaks in WAXD profiles, but its SAXS pattern showed a clear primary scattering at q* = 0.12 nm^-1, corresponding to an averaged domain spacing D of 52.4 nm.

    “although no peaks were presented in WAXD profiles of LA-CL-DL-3, its SAXS pattern showed a clear primary scattering at q* = 0.12 nm À1 , corresponding to the averaged domain spacing (D) of 52.4 nm (D = 2π/q*).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    LA-CL-DL-7 had certain crystallinity and microphase separation structure, and exhibited the highest elongation at break with holding strength exceeding that of all other samples.

    “because LA-CL-DL-7 had certain crystallinity and microphase separation structure, it exhibited the highest elongation at break with its holding strength exceeded that of all other samples.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    With the increase of PDLLA ratio, the increase of chain extender content and the decrease of molecular weight of PLLA and PCL, crystallization of copolymer was significantly inhibited.

    “Based on the aforementioned data, with the increase of PDLLA ratio, the increase of chain extender content and the decrease of molecular weight of PLLA and PCL, crystallization of copolymer was significantly inhibited.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    With the increase of the amount of PDLLA, the supersaturation of the chain extender, and the decrease of length of precursor, the intensity of the diffraction peak was weakened or even disappeared, indicating that the homocrystallization of PLLA was inhibited with the change of these variables after the addition of the block copolymer.

    “With the increase of the amount of PDLLA, the supersaturation of the chain extender, and the decrease of length of precursor, the intensity of the diffraction peak was weakened or even disappeared, indicating that the homocrystallization of PLLA was inhibited with the change of these variables after the addition of the block copolymer.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    With increasing PDLLA content, the crystallinity of the copolymer decreased, and the increase in elongation at break was accompanied by a decrease in tensile stress and Young's modulus.

    “with the increase of PDLLA content, the crystallinity of the copolymer decreased, and the increase in its elongation at break was accompanied by a decrease in tensile stress and Young's modulus.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    By adjusting the ratio of PLLA and PDLLA from 1:1 to 1:5, the elongation at break of the sample was increased by about 170 times when the strength was reduced by 2/3.

    “By adjusting the ratio of PLLA and PDLLA from 1:1 to 1:5, the elongation at break of the sample was increased by about 170 times when the strength was reduced by 2/3.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingown data

    LA-CL-DL-7 block copolymer exhibited excellent strength (14 MPa) and elongation at break (about 520%).

    “LA-CL-DL-7 block copolymer exhibited excellent strength (14 MPa) and elongation at break (about 520%).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    Compared with LA-CL-DL-1 to LA-CL-DL-3, at the same PDLLA ratio, the elongation at break of low molecular weight samples LA-CL-DL-5 to LA-CL-DL-7 was greatly improved, with LA-CL-DL-7 reaching 520%.

    “Compared with samples from LA-CL-DL-1 to LA-CL-DL-3, with the same PDLLA ratio, the elongation at break of low molecular weight samples from LA-CL-DL-5 to LA-CL-DL-7 had been greatly improved, with LA-CL-DL-7 reaching a elongation at break of 520%.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Copolymers of ε-caprolactone and lactide have good toughness (elongation at break >100%) but their tensile modulus and strength decrease significantly compared with PLLA or PDLA homopolymer.

    “The results showed that compared with PLLA or poly (D-lactide) (PDLA) homopolymer, the copolymers had good toughness (elongation at break >100%), but the tensile modulus and strength decreased significantly.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [28] 28. M. Hiljanen-Vainio, T. Karjalainen, J. Seppälä, J. Appl. Polym. Sci. 1996, 59, 1281.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    PCL is a biodegradable polyester with good biocompatibility, a Tg of about -60 C, and excellent toughness at room temperature (elongation at break >600%).

    “Polycaprolactone (PCL) is a kind of biodegradable polyester with good biocompatibility.Its T g is about À60 C and it has excellent toughness at room temperature (elongation at break >600%).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [27] 27. M. Arrieta, L. Peponi, Eur. Polym. J. 2017, 89, 174.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    The amorphous PDLLA will reduce the crystallization capacity of other segments and thus affect the competition of crystallization and phase separation between PCL and PLA in the block copolymer.

    “The amorphous PDLLA will reduce the crystallization capacity of other segments and thus affect the competition of crystallization and phase separation between PCL and PLA in the block copolymer.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    PLLA-PCL block copolymer has an elongation at break of 134% and a tensile modulus of 225 MPa.

    “The elongation at break and tensile modulus of PLLA-PCL copolymer were 134% and 225 MPa, respectively.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [29] 29. G. Maglio, A. Migliozzi, R. Palumbo, Polymer 2003, 44, 369.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    PLA has high mechanical strength, biocompatibility and excellent processing properties.

    “PLA has high mechanical strength, biocompatibility and excellent processing properties.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [6][7][8][9]

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    PLA's inherent brittleness, low thermal deformation temperature and poor ductility are the main bottlenecks hindering its application in packaging, film materials and disposable cutlery.

    “However, its inherent brittleness, low thermal deformation temperature and poor ductility are the main bottlenecks hindering the application of PLA in packaging, film materials and disposable cutlery.[10][11][12][13][14]”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [10][11][12][13][14]

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationown data

    This work used biodegradable materials to prepare extraordinary toughness copolymers without losing biocompatibility, which may provide a feasible method for obtaining high toughness and biodegradable PLA-based materials.

    “This work used biodegradable materials to prepare extraordinary toughness copolymers without losing the biocompatibility, which may provide a feasible method for obtaining high toughness and biodegradable PLA-based materials.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationown data

    The change of film transparency was consistent with the change law of crystallinity, indicating that reducing crystallinity was an effective mean to improve the transparency of copolymer film.

    “The change of film transparency was consistent with the change law of crystallinity, indicating that reducing crystallinity was an effective mean to improve the transparency of copolymer film.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    The presence of excessive chain extenders would make the chain extension reaction more saturated.

    “The presence of excessive chain extenders would make the chain extension reaction more saturated.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    For LA-CL-DL-7, shorter prepolymer segments and a higher proportion of short chain prepolymers increased the number of urethane bonds per single chain, providing more opportunities for hydrogen bond formation, leading to an increased degree of microphase separation.

    “For LA-CL-DL-7, due to the shorter length of its prepolymer segments and the more proportion of short chain prepolymers, the number of urethane bonds in the single chain increased, which provided more opportunities for the formation of hydrogen bonds, leading to an increase degree of microphase separation.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationnone given

    The introduction of PDLLA inhibited the crystallization performance of the block copolymer, leading to a decrease in their thermal stability.

    “The introduction of PDLLA inhibited the crystallization performance of the block copolymer, leading to a decrease in their thermal stability.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: PDLLA is an amorphous material that can reduce the crystallization ability of other materials, and increasing its proportion enhances the toughness of the material.

  • May combine two claims.

    Interpretationown data

    For LA-CL-DL-1, LA-CL-DL-2, LA-CL-DL-5 and LA-CL-DL-6, the polarity difference between the soft and hard segments of the copolymer was not significant, and the orderness of the microphase-separated structure was poor.

    “indicating that the polarity difference between the soft and hard segments of the copolymer was not significant, and the orderness of the microphase-separated structure was poor.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    More prepolymer segments reduce the regularity and increase the flexibility of the molecular chain.

    “This would reduce the regularity and increase the flexibility of the molecular chain.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationreasoning

    Due to excessive chain extenders, LA-CL-DL-4 copolymer can form more hydrogen bonds, resulting in a more pronounced degree of microphase separation.

    “Due to excessive chain extenders, LA-CL-DL-4 copolymer can form more hydrogen bonds, resulting in a more pronounced degree of microphase separation.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Excessive chain extenders can induce chain extension by forming urea bonds through hydrolysis and subsequent addition reaction of terminal isocyanate groups.

    “the use of excessive chain extenders can induce chain extension by forming urea bonds by the hydrolysis and following addition reaction of the isocyanate groups that were introduced in the chain terminals.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    The decrease of molecular weight of PLLA and PCL may increase the proportion of PDLLA in the single chain, and enhance the role of PDLLA to inhibit the crystallization behavior of the copolymer.

    “Besides, the decrease of molecular weight of PLLA and PCL may increase the proportion of PDLLA in the single chain, and enhance the role of PDLLA to inhibit the crystallization behavior of the copolymer.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationnone given

    The addition of chain extender makes it easier for hard segments to gather together to form a hard segment microzone, improving the degree of microphase separation.

    “The addition of chain extender made it easier for hard segments to gather together to form a hard segment microzone, improving the degree of microphase separation.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Microphase separation can improve tensile strength or elongation to varying degrees.

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Excessive chain extenders can make the chain extension reaction more complete and yield copolymers with higher molecular weight.

    “because excessive chain extenders can make the chain extension reaction more complete and so as to obtain copolymers with higher molecular weight.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    With the increase of the amount of PDLLA added, the crystallization behavior was gradually inhibited, resulting in the reduction of its crystallinity and melting point.

    “Therefore, with the increase of the amount of PDLLA added, the crystallization behavior was gradually inhibited, resulting in the reduction of its crystallinity and melting point.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationreasoning

    This feature may be related to the increase in the content of urethane bonds that can form hydrogen bonds and its impact on the degree of microphase separation.

    “This feature may be related to the increase in the content of urethane bonds that can form hydrogen bonds and its impact on the degree of microphase separation.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A similar increasing trend of Young's modulus with breaking elongation was observed in other polyurethanes.

    “A similar increasing trend of Young's modulus with breaking elongation was observed in other polyurethanes.44,45”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [44] 44. M. C. Righetti, M. Gazzano, M. L. Di Lorenzo, R. Androsch, Eur. Polym. J. 2015, 70, 215.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [45] 45. M. Cocca, R. Androsch, M. C. Righetti, M. Malinconico, M. L. Di Lorenzo, J. Mol. Struct. 2014, 1078, 114.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

43 of 43

  • The paper relies on this without support.

    The chain extension method is a fast and efficient method to prepare PLA with high molecular weight.

    “The chain extension method has gradually become a fast and efficient method to prepare PLA with high molecular weight.”

  • The paper relies on this without support.

    The chain extension reaction between HDI and the three dihydroxyl compounds PLLA, PCL and PDLLA is random.

    “The PLA block copolymers were prepared by the random chain extension reactions between isocyanate groups of HDI and three dihydroxyl compounds PLLA, PCL and PDLLA using Sn(Oct) as the catalyst”

  • The paper relies on this without support.

    Thermodynamic incompatibility between soft and hard segments in polyurethane causes the segments to aggregate into independent microphases, forming microphase separation structures.

    “Due to the thermodynamic incompatibility between the soft and hard segments in polyurethane, the soft and hard segments were tended to aggregate to form independent microphases, resulting in the formation of microphase separation structures.”

  • The paper relies on this without support.

    Crystallization and microphase separation compete with each other during solution casting.

    “It had been reported that crystallization and microphase separation will compete with each other during solution casting process.”

  • The paper relies on this without support.

    Microphase separation can improve tensile strength or elongation to varying degrees.

    “It has been found that microphase separation can improve tensile strength or elongation to varying degrees.”

  • The paper relies on this without support.

    It is not that the higher the degree of microphase separation, the better the mechanical properties.

    “At the same time, it was not that the higher the degree of microphase separation, the better the mechanical properties.”

  • The paper relies on this without support.

    PDLLA is an amorphous material that can reduce the crystallization ability of other materials, and increasing its proportion enhances the toughness of the material.

    “PDLLA was an amorphous material that can reduce the crystallization ability of other materials, and its increasing proportion will enhance the toughness of the material.”
7 of 7

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Conclusion swaps the monomers used for PLLA and PCL

    Minor

    The conclusion pairs PLLA with ε-CL and PCL with L-LA. The paper's earlier description instead pairs PLLA with L-LA and PCL with ε-CL.

  • LA-CL-DL-1 molecular weight differs from Table 3

    Minor

    The text assigns LA-CL-DL-1 a number-average molecular weight of 25.9 kg/mol, but Table 3 lists 35.7 kg/mol. The table assigns 25.9 kg/mol to LA-CL-DL-2.

2 of 2

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Drumright R. E., 1841, Adv. Mater., 2000, 12

Cited by

Sorted by citations

Related

Authors
Chen, Y., Zhang, J., Zhang, Y., Cao, W., Liu, X., Bao, J., Zhang, X., & Chen, W.
Affiliations
  • Zhejiang Sci-Tech University (CN)
  • Department of Research and Development Yangzhou Huitong Technology Co., Ltd. Yangzhou China
Corresponding author
  • Bao, Jianna
  • Chen, Wenxing
ORCID
Venue
Journal of Polymer Science
Publisher
Wiley
Published
2023-08-07
Volume
61
Issue
19
Pages
2303-2315
ISSN
  • 2642-4150 (ISSN-L)
  • 2642-4169
DOI
10.1002/pol.20230425
OpenAlex
W4385634710
Cited by
9
References
44
Citations by year
2026: 3 · 2025: 4 · 2024: 2
FWCI
0.57
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
Journal of Polymer Science (publishedVersion)
Funders
  • National Natural Science Foundation of China
  • Zhejiang Sci-Tech University
  • Natural Science Foundation of Zhejiang Province (LY22E030006)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
Keywords
block copolymers, chain extension, crystallization, microphase separation, toughness, tensile strength, elongation at break, thermal stability, biodegradable polymers, chain length effects

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