Premium
Miscibility and morphology of poly(vinylidene fluoride)/poly[(vinylidene fluoride)‐ ran ‐trifluorethylene] blends
Author(s) -
Gregorio Rinaldo,
Chaud Matheus Rigobelo,
Nunes Dos Santos Wilson,
Baldo João Baptista
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10529
Subject(s) - miscibility , materials science , crystallinity , copolymer , fluoride , crystallization , lamellar structure , polymer chemistry , phase (matter) , polymer blend , chemical engineering , ferroelectricity , polymer , dielectric , composite material , organic chemistry , chemistry , inorganic chemistry , engineering , optoelectronics
This study presents an investigation of the effect of the different crystalline phases of each blend component on miscibility when blending poly(vinylidene fluoride) (PVDF) and its copolymer poly[(vinylidene fluoride)‐ ran ‐trifluorethylene] [P(VDF–TrFE)] containing 72 mol % of VDF. It was found that, when both components crystallized in their ferroelectric phase, the PVDF showed a strong effect on the crystallinity and phase‐transition temperature of the copolymer, indicating partial miscibility in the crystalline state. On the other hand, immiscibility was observed when both components, after melting, were crystallized in their paraelectric phase. In this case, however, a decrease in crystallization temperatures suggested a strong interaction between monomers in the liquid state. Blend morphologies indicated that, in spite of the lack of miscibility in the crystalline state, there is at least miscibility between PVDF and P(VDF–TrFE) in the liquid state, and that a very intimate mixture of the two phases on the lamellar level can be maintained upon crystallization. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1362–1369, 2002