New Approach to Fabricate Novel Fluorosilicone Thermoplastic Vulcanizate with Bicrosslinked Silicone Rubber-Core/Fluororubber-Shell Particles Dispersed in Poly(vinylidene Fluoride): Structure and Property
New Approach to Fabricate Novel Fluorosilicone Thermoplastic Vulcanizate with Bicrosslinked Silicone Rubber-Core/Fluororubber-Shell Particles Dispersed in Poly(vinylidene Fluoride): Structure and Property
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DOI：
10.1021/acs.iecr.5b04676
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发表时间：
2016-02
影响因子：
4.2
通讯作者：
Yukun Chen;Youhong Wang;Chuanhui Xu;Yanpeng Wang;Changyun Jiang
中科院分区：
文献类型：
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作者：
Yukun Chen;Youhong Wang;Chuanhui Xu;Yanpeng Wang;Changyun Jiang
本文报道了一种新的核-壳动态硫化方法，以交联可控的硅橡胶（SR）/氟橡胶（FKM）核-壳粒子制备聚偏氟乙烯（PVDF）基热塑性硫化橡胶（TPV）。通过透射电镜（TEM）、扫描电镜（SEM）、能谱仪（EDX）和红外光谱（FT-IR）分析，证实了核壳结构的形成。在PVDF/FKM/SR（40/30/30）TPV中，核壳粒子的尺寸约为2 μm，FKM壳层的厚度约为400 nm。可以控制SR-核和FKM-壳的交联密度以定制TPV的性能。发现核-壳双交联TPV的tan δ值在1-1000 cpm范围内可保持在0.3左右。TPV具有良好的力学性能，其中撕裂强度最高。
Herein, we report a new method, core–shell dynamic vulcanization, to prepare a poly(vinylidene fluoride) (PVDF)-based thermoplastic vulcanizate (TPV) with cross-linking-controlled silicone rubber (SR)/fluororubber (FKM) core–shell particles. The bicrosslinked SR-core/FKM-shell structure effectively stabilized the blending morphology of TPV, avoiding the direct contact of PVDF and SR. Results of transmission electrom microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and Fourier transform-infrared (FT-IR) confirmed the formation of core–shell structure. In the PVDF/FKM/SR (40/30/30) TPV, the size of core–shell particle was ∼2 μm, and the thickness of the FKM shell was ∼400 nm. The cross-link density of SR-core and FKM-shell could be controlled to tailor the properties of the TPV. It was found that the tan δ value of core–shell bicrosslinked TPV could be maintained at around 0.3 in range of 1–1000 cpm. The TPV exhibited good mechanical properties in which its tear strength ...