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首页> 外文期刊>Polymer Testing >Effects of partial replacement of silicone rubber with flurorubber on properties of dynamically cured poly(vinylidene fluoride)/silicone rubber/flurorubber ternary blends
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Effects of partial replacement of silicone rubber with flurorubber on properties of dynamically cured poly(vinylidene fluoride)/silicone rubber/flurorubber ternary blends

机译：氟橡胶部分替代硅橡胶对动态固化聚偏二氟乙烯/硅橡胶/氟橡胶三元共混物性能的影响

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摘要

Blends of poly(vinylidene fluoride) (PVDF), silicone rubber (SR) and flurorubber (FKM) were prepared via peroxide dynamic vulcanization. The effect of FKM loading on the morphology, mechanical properties, crystallization behavior, rheology and dynamic mechanical properties of the PVDF/SR/FKM ternary blends was investigated. A "network" was observed in the PVDF/SR binary blends, which disappeared in the ternary blends, but a core-shell-like structure was formed. The mechanical properties were significantly improved. The Izod impact strength of PVDF/SR/FKM blend with 19 wt% FKM was 18.3 kJ/m 2, which was 3-4 times higher than the PVDF/SR binary blend. The complex viscosity and storage modulus of the PVDF/SR/FKM blends decreased with increasing FKM content, hence the processability was improved. The increase of FKM content seemed to show a favorable effect on the crystallization of the PVDF component. It promoted the nucleation process of PVDF, leading to increased polymer crystallization rate and higher crystallization temperature. The glass-rubber transition temperature of the PVDF phase moved to a lower temperature.
机译：通过过氧化物动态硫化制备了聚偏二氟乙烯（PVDF），硅橡胶（SR）和氟橡胶（FKM）的混合物。研究了FKM负载量对PVDF / SR / FKM三元共混物的形态，力学性能，结晶行为，流变学和动态力学性能的影响。在PVDF / SR二元共混物中观察到“网络”，在三元共混物中消失，但是形成了核-壳状结构。机械性能得到明显改善。具有19 wt％FKM的PVDF / SR / FKM混合物的悬臂梁式冲击强度为18.3 kJ / m 2，是PVDF / SR二元混合物的3-4倍。 PVDF / SR / FKM共混物的复数粘度和储能模量随FKM含量的增加而降低，因此可加工性得到改善。 FKM含量的增加似乎对PVDF组分的结晶显示出有利的作用。它促进了PVDF的成核过程，从而提高了聚合物的结晶速率并提高了结晶温度。 PVDF相的玻璃-橡胶转变温度移至较低温度。

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