Abstract
The blending of semi-crystalline polymer, poly (vinylidene fluoride), (PVDF) and uncross-linked elastomer epoxidized natural rubber with 50 mol% epoxide (ENR-50) blends were prepared in an internal mixer by melt mixing process. Dynamic mechanical analysis (DMA) and dielectric analysis (DEA) of PVDF/ENR-50 blends were investigated. It was found that the pure PVDF showed higher storage modulus than that of the pure ENR-50 and storage modulus of the PVDF/ENR blends decrease with increasing ENR-50 content. Furthermore, PVDF showed two relaxation peaks correspond to αa-relaxation and αc-relaxation, while ENR-50 showed only a single relaxation that is related to α-relaxation or glass transition temperature (Tg). Two relaxation peaks were observed in the PVDF/ENR-50 blends due to phase separation. However, the maximum peak of relaxation shifted toward to higher and lower temperature compared with the pure components which indicates the partial miscible blends. Moreover, at high temperature, the neat polymer and blends showed a sharp increase of loss factor (ε) that correspond to conductivity and/or Maxwell-Wagner-Sillar (MWS) process.
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