Cited by 38Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesSolidification and crystal growth phenomena

Unusual fractional crystallization behavior of novel crystalline/crystalline polymer blends of poly (ethylene suberate) and poly (ethylene oxide) with similar melting points

Weng, Mengting, Qiu, Zhaobin·2014·Macromolecules

Abstract

Novel crystalline/crystalline polymer blends of biodegradable poly(ethylene suberate) (PESub) and biocompatible poly(ethylene oxide) (PEO) were prepared through a solution and casting method. The basic thermal properties, including both glass transition temperature and melting point, of both of the components are very close to each other. The two components are miscible as no obvious phase separation can be detected, forming novel miscible polymer blends of two crystalline polymers. PESub/PEO blends show two or three crystallization exotherms at different supercoolings. The complex crystallization behaviors are attributed to the occurrence of the fractional crystallization of the minor component of the blends. Depending on the blend composition, the major component of the blend crystallizes first and the minor component crystallizes later. During the crystallization of the major component, the amorphous minor component is completely included the interlamellar region of the major component or most of the amorphous minor component is expelled out of the interlamellar region while only a few is incorporated between the lamellae of the major component. In both cases, the fractional crystallization of the minor component occurs at large supercooling because of the confinement effect of the lamellae of the major component. In the present work, the fractional crystallization of PESub or PEO may occur at large supercooling when its content is low. PESub/PEO blends may be the first model that the fractional crystallization of each component occurs at large supercooling when its content is low; thus, they provide a rare system to study the unique crystalline morphology and crystallization behavior of miscible crystalline/crystalline polymer blends. Such research is very interesting and challenging for a better understanding of the crystalline morphology and crystallization behavior of crystalline polymer blends from both academic and practical viewpoints.

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Crossref · 10.1021/ma502019x

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  • In PES/PEO blends, both components showed fractionated crystallization at their lower content due to similar Tc.

    “An unusual fractionated crystallization behavior was observed by Weng and Qiu [81] in PES/PEO blends where both components showed fractionated crystallization at their lower content due to similar T c .”

    From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [81]

  • In miscible blends, when the confined spaces are interconnected and most of low Tc polymer is located within the interfibrillar regions, two fractionated crystallization peaks are found.

    “However, when the confined spaces are interconnected and most of low T c polymer is located within the interfibrillar regions, two fractionated crystallization peaks are found.”

    From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [81]

  • In miscible blends, after high Tc component crystallization, if the majority of amorphous low Tc component is segregated within the interlamellar region of high Tc component, the low Tc component will crystallize at much larger undercooling compared to the bulk case, and only one exothermic peak appears.

    “After the completion of high T c component crystallization, if the majority of amorphous low T c component is segregated within the interlamellar region of high T c component, the low T c component will crystallize at much larger undercooling compared to the bulk case, and only one exothermic peak appears.”

    From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [81]

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Authors
Weng, M., & Qiu, Z.
Affiliations
State Key Laboratory of Chemical Resource Engineering (CN)
Corresponding author
Qiu, Zhaobin
Venue
Macromolecules
Published
2014-11-19
Volume
47
Issue
23
Pages
8351-8358
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2315086595
Cited by
38
References
31
Citations by year
2026: 2 · 2025: 1 · 2023: 4 · 2022: 3 · 2021: 5 · 2020: 4 · 2019: 2 · 2018: 2 · 2017: 7 · 2016: 2 · 2015: 5 · 2014: 1
FWCI
3.49
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
Funders
National Natural Science Foundation of China (51221002, 51373020)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Materials Chemistry › Solidification and crystal growth phenomena
Keywords
poly(ethylene oxide), fractional crystallization, miscible polymer blends, supercooling, interlamellar region, crystallization exotherm, crystal morphology, biodegradable polymers, biocompatible polymers

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