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Polymorphism and crystallization in poly(vinylidene fluoride)/ poly(ϵ-caprolactone)–block–poly(dimethylsiloxane)–block–poly(ϵ-caprolactone) blends

Version 2 2024-06-18, 18:33
Version 1 2020-02-21, 19:25
journal contribution
posted on 2024-06-18, 18:33 authored by SM Seraji, Q Guo
The miscibility, crystallization kinetics and crystalline morphology of a new system of poly(vinylidene fluoride)/poly(ϵ-caprolactone)-block-poly(dimethylsiloxane)-block-poly(ϵ-caprolactone) (PVDF/PCL-b-PDMS-b-PCL) triblock copolymer were investigated by a variety of techniques. The miscibility and phase behaviour of PVDF/PCL-b-PDMS-b-PCL were studied by determination of the melting point temperature, crystallization kinetics and Fourier transform infrared (FTIR) mapping. Chemical imaging was used as a new technique to characterize the interaction of polymer blends in crystalline morphology. The results demonstrate the existence of characteristic peaks of both PVDF and PCL in the chosen crystalline area. The crystalline structures of PVDF were affected by the PCL-b-PDMS-b-PCL triblock copolymer and facilitate the formation of the β polymorph which was illustrated by FTIR analysis. The β crystal phase fraction increases significantly on increasing the composition of the PCL-b-PDMS-b-PCL triblock copolymer. In addition, confined crystallization of PCL within PVDF inter-lamellar and/or inter-fibrillar regions was confirmed through polarizing optical microscopy, wide-angle X-ray diffraction and small-angle X-ray scattering analysis. © 2019 Society of Chemical Industry.

History

Journal

Polymer International

Volume

69

Pagination

173-183

Location

Chichester, Eng.

ISSN

0959-8103

eISSN

1097-0126

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Issue

2

Publisher

Wiley