Mechanical study of poly(vinylidene fluoride)-poly(methyl methacrylate) amorphous blends |
| |
Authors: | J Martínez-Salazar J C Canalda Cámara F J Baltá Calleja |
| |
Affiliation: | (1) Instituto de Estructura de la Materia, CSIC, Serrano 119, Madrid, Spain |
| |
Abstract: | Amorphous films of poly(vinylidene fluoride)-poly (methyl methacrylate) were prepared by initial precipitation from a solvent
and rapid solidification at ≈ 15 °C from the molten state. The PVDF/PMMA compositions studied were 25/75, 45/55, 50/50, 55/45,
60/40 and 75/25. X-ray scattering analysis suggests that mixture of the two components throughout the composition range studied
occurs at a molecular level. The parallel decrease of the microhardness, which obeys a simple expression:H
blend =H
PMMA (1−φ) (φ being the PVDF concentration) and the glass transition temperature,T
g, following the predictions, of Gordon and Taylor, reveals that the depression of microhardness is caused by the shift ofT
g towards lower temperatures. It is pointed out that the effect of PVDF molecules is to act as a softening agent within the
PMMA component. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|