The phase diagram and morphology of blends of poly (vinylidene fluoride) and poly (acrylate rubber)

Poly(vinylidiene fluoride) (PVDF) is a semicrystalline polymer with good mechanical and thermal properties that is miscible with many carbonyl containing polymers such aspolyketones [1], polyacetates [2,3], and poly acrylates [4-6], It was suggested that compatibility arises from strong dipolemoments of polymer. The miscibility of PVDF with poly(methyl methacrylate) PMMA has been extensively investigated [7-10]. The results indicate that the blends aremiscible in the melt and in the amorphous phase. With increasing PMMA content more than 50% only an amorphousblend can be obtained.Acrylic rubber, ACM, is a copolymer of poly(ethyl acrylate), with amount of (5%) chlorine cure-site monomer. There is the same interaction between CF2 group of PVDF and carbonyl group of ACM as in the case of PVDF and PMMA. But as stated by Li et al.[11] the interaction between PVDF andPMMA is stronger than that between PVDF and ACM due to the lower carbonyl concentration of ACM. Our goal in this work is to detect the miscibility gap of PVDF and ACM and effect of ACM on crystalline morphology of PVDF