Segmental dynamics and rheology of miscible poly(vinylidene fluoride)/poly(methyl methacrylate) (70/30 by weight) blend filled with titania or poly(methyl methacrylate)-grafted titania
作者： Yunxiang Zhang , Min Zuo , Ting Liu , Yihu Song , Qiang Zheng
DOI: 10.1016/J.COMPSCITECH.2015.11.031
关键词:
摘要: Abstract Titania (TiO2) or poly (methyl methacrylate) (PMMA)-grafted titania (TiO2-g-PMMA) were incorporated into miscible (vinylidene fluoride) (PVDF)/PMMA (70/30 by weight) blend melt mixing. TiO2 particles exhibited aggregation in the composites as displayed scanning electron microscopy observations and storage modulus (G′) plateau low frequency (ω) region. This is accompanied with restriction of molecular mobility elevation glass transition temperature (Tg). Conversely, TiO2-g-PMMA nanoparticles well-defined cross-linked PMMA shells 5 nm thickness are well-distributed matrix, without influence on Tg appearance low-ω plateau. The dispersion not stable during thermal annealing composite while demonstrate excellent stability. Broadband dielectric spectroscopies indicate that influenced relaxations αa αc, effect was negligible. Furthermore, core–shell structured produced considerable smaller interfacial polarization than composites.
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