The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.
Modification of poly(L‐lactides) by blending: mechanical and hydrolytic behavior
Abstract
Abstract Two different poly(L‐lactides) (PLLAb and PLLAa) were blended with poly(ε‐caprolactone) (PCL) and an elastic poly(ε‐caprolactone/L‐lactide) P(CL/L‐LA) copolymer to modify the mechanical properties of PLLA. Blends of both PLLAs with 20 wt.‐% of PCL were prepared. PLLAa was blended with 20 wt.‐% of P(CL/L‐LA) copolymer, and blends of PLLAb and P(CL/L‐LA) copolymer were made with copolymer contents of 5, 10, 20 and 30 wt.‐%. The tensile properties and impact and shear strengths were determined as a measure of the mechanical properties. The hydrolytic behavior of the blends was investigated, and the changes in shear strength as a function of hydrolysis were followed. The structure of the hydrolyzed samples was studied by means of scanning electron microscopy (SEM). The properties of PLLA changed considerably when blended with PCL or P(CL/L‐LA) copolymer. An increasing amount of copolymer in PLLAb decreased tensile modulus and shear strength, but improved the strain and impact strength. In hydrolysis, blends containing PLLAa degraded slower than blends of PLLAb because of the higher initial molar mass and purity of PLLAa. The molar masses of PLLAb blends decreased dramatically, and less than 10% of the initial molar masses and shear strengths were left after 12 weeks in vitro. The morphology of the blends affected the degradation. The blends containing P(CL/L‐LA) copolymer had a porous structure which facilitated water absorption into the blend.
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“Under ambient conditions (dry at 25 ° C), the addition of the softer PLCL-PEG to PLLA reduced its strength and stiffness (Fig. 3) as has been reported previously for PLLA:PLCL blends [25, 26], with the PLCL(70:30)-PEG copolymer having a larger effect than PLCL(80:20)-PEG.”
From Tuning structural relaxations, mechanical properties, and degradation timescale of PLLA during hydrolytic degradation by blending with PLCL-PEG (2019) · cites this paper as [25]
In the citing paper
“blends of PLLA with poly( L -lactide-coε -caprolactone) (PLCL) have been developed and show improved miscibility [25-27]”
From Tuning structural relaxations, mechanical properties, and degradation timescale of PLLA during hydrolytic degradation by blending with PLCL-PEG (2019) · cites this paper as [25]
Citations
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Cited by
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An Overview of Polylactides as Packaging Materials
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Poly(lactic acid) modifications
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Metadata
- Authors
- Hiljanen‐Vainio, M., Varpomaa, P., Seppälä, J., & Törmälä, P.
- Affiliations
- Tampere University of Technology (FI)
- Corresponding author
- Seppälä, Jukka
- ORCID
- Seppälä, Jukka
- Venue
- Macromolecular Chemistry and Physics
- Publisher
- Wiley
- Published
- 1996-04
- Volume
- 197
- Issue
- 4
- Pages
- 1503-1523
- ISSN
- 1022-1352 (ISSN-L)
- 1521-3935
- OpenAlex
- W1991387651
- Cited by
- 249
- References
- 37
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 2 · 2023: 5 · 2022: 7 · 2021: 6 · 2020: 6 · 2019: 14 · 2018: 6 · 2017: 12 · 2016: 11 · 2015: 15 · 2014: 10 · 2013: 11 · 2012: 15
- FWCI
- 2.18
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Chemistry and Physics (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Engineering › Biomedical Engineering › Bone Tissue Engineering Materials
- Keywords
- poly(L-lactic acid), polycaprolactone, polymer blends, mechanical properties, hydrolytic degradation, tensile properties, impact strength, shear strength, blend morphology, water absorption, biodegradable polymers
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