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Flow‐Induced Orientation in Miscible Crystalline Polymer Blends of Poly(vinylidene fluoride) and Poly[(3‐hydroxybutyrate)‐ co ‐(3‐hydroxyvalerate)]
Author(s) -
Kaito Akira,
Nakayama Kazuo,
Shimizu Hiroshi
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800142
Subject(s) - lamellar structure , materials science , crystallization , polymer , polymer chemistry , polymer blend , chemical engineering , fluoride , crystal structure , crystal (programming language) , morphology (biology) , crystallography , composite material , chemistry , copolymer , inorganic chemistry , biology , engineering , genetics , programming language , computer science
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.