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Flow-Induced Orientation in Miscible Crystalline Polymer Blends of Poly(vinylidene fluoride) and Poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)]

✍ Scribed by Akira Kaito; Kazuo Nakayama; Hiroshi Shimizu

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
489 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Oriented films of miscible polymer blends of poly(vinylidene fluoride) and poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyvalerate)] were prepared using a flow‐orientation technique. The lamellar structure and crystal orientation depended upon composition and flow temperature (T~flow~). An interlamellar exclusion structure was induced in the blend flow‐oriented below 150 °C, whereas an interlamellar inclusion structure was developed above 150 °C. The crystal orientation of PHBHV was affected by the lamellar structures because the PHBHV chains crystallized in the pre‐existing crystalline morphology of PVDF. Crystallization of PHBHV was markedly restricted at lower PHBHV contents.

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