Cited by 37Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesSolidification and crystal growth phenomena

Confined nucleation and growth of poly (ethylene oxide) on the different crystalline morphology of poly (butylene succinate) from a miscible blend

He, Zhiyuan, Liang, Yongri, Han, Charles C.·2013·Macromolecules

Abstract

The confined and fractional crystallization behavior of poly(ethylene oxide)(PEO) in miscible poly(butylene succinate)(PBS)/PEO blends has been investigated. Both nucleation and growth of PEO crystals through the two-step crystallization process were significantly influenced by the morphology of pre-existed PBS spherulites. At the first crystallization step, the PEO component as diluents was segregated into different regions (interlamellar, interfibrillar and interspherulitic) of PBS crystals, which was dependent on the crystal growth rate of PBS and the diffusion coefficient of PEO. With the increase of crystallization temperatures of PBS ( T c,PBS ), more and more PEO molecules were excluded out of the lamella stacks of PBS, and the segregations of PEO became larger and larger. Meantime, the connectivity between the adjacent PEO domains was reduced dramatically. At the second crystallization step, PEO crystallized subsequently within the existed frameworks of PBS spherulites formed at various T c,PBS . On the one hand, the nucleation rate of PEO was determined by the total solid–liquid interfacial area between PBS crystals and PEO domains, which could significantly reduce the free energy barrier of nucleation embryos. As T c,PBS increased, the nucleation rate of PEO decreased with the decrease of PBS crystal surfaces which were around PEO domains. The fractional crystallization of PEO occurred when the nuclei formed at various supercoolings. On the other hand, the crystal growth rate of PEO was mostly influenced by the connectedness between the PEO domains. With the increase of T c,PBS, the continuous phases of PEO were transformed into isolated domains. The crystal growth of PEO decreased gradually, due to the restrictions to the diffusion of PEO chains. PEO could only nucleate and grow inside each isolated domains, just forming tiny PEO crystals. It was found that the crystallization of PEO was dependent not only on the diffusion length of PEO, but also on the intrinsic morphological features of PBS spherulites.

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Crossref · 10.1021/ma4015214

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  • In PBS/PEO blend (50/50 wt%) annealed at different Tc,PBS, with Tc,PBS increasing from 80 °C to 100 °C, the PBS spherulitic skeleton changes from a highly branched and interconnected network to a predominantly cellular-like structure, where the confining geometry becomes more closed, regular and strict.

    “With T c , PBS increasing from 80 °C to 100 °C, the PBS spherulitic”

    From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [71]

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Authors
He, Z., Liang, Y., & Han, C. C.
Affiliations
Chinese Academy of Sciences (CN)
Corresponding author
  • Liang, Yongri
  • Han, Charles C.
Venue
Macromolecules
Published
2013-10-03
Volume
46
Issue
20
Pages
8264-8274
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W1969915723
Cited by
37
References
44
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 1 · 2018: 3 · 2017: 3 · 2016: 5 · 2015: 4 · 2014: 2
FWCI
2.65
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
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), poly(butylene succinate), miscible polymer blends, confined crystallization, fractional crystallization, nucleation, crystal growth, spherulite morphology, lamellar morphology, nucleation rate, diffusion coefficient, crystallization temperature, polymer blend morphology

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