Melt-solidified and cast films of P(VDF-TrFE) copolymers: A comparison study

• Autor(a) principal: Alves, N. [UNESP]
• Data de Publicação: 1994
• Outros Autores: Silva, N. G., Conceicao Silva, A. J.G., Kondo, A. A., Plepis, A. M.G., Mascarenhas, Y. P., Giacometti, J. A., Oliveira, O. N.
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1109/ISE.1994.514847; http://hdl.handle.net/11449/219298

Structural and electrical properties of poly(vinylidene fluoride-trifluorethylene)P(VDF-TrFE) films, obtained either from casting a solution or by compression moulding from a molten phase, have been reported in a number of studies. Even though results may differ to a considerable extent when samples are prepared with different methods, few studies address these differences whose origins may lie in distinct thermal treatments. In the present study we undertake a careful comparison of experimental DSC and FTIR results on 60/40, 70/30 and 80/20 P(VDF-TrFE) copolymer samples, fabricated using these two methods. The DSC results for the 60/40 and 70/30 copolymer show two phase transitions, with the samples behaving as a paraelectric material only after the 2nd transition. It is shown that the main differences between melt-solidified and cast films arise from the thermal treatment suffered by the former samples.