A method to essentially increase the compatibility of thermoplastic polyurethane/methyl vinyl silicone rubber based thermoplastic vulcanizate,Journal of Applied Polymer Science

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A method to essentially increase the compatibility of thermoplastic polyurethane/methyl vinyl silicone rubber based thermoplastic vulcanizate
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-02-15 , DOI: 10.1002/app.52219
Yongyin Cui ₁ , Hongwei Pan ₁ , Changrui Shi ₁ , Huichao Zhuang ₁ , Qingfu Wang ₁ , Chengzhong Zong ₁

Affiliation

To simplify the production process of thermoplastic polyurethane (TPU)/methyl vinyl silicone rubber (VMQ)-based thermoplastic vulcanizate (TPV), a series of block TPUs with different hydroxybutanyl terminated polydimethylsiloxane (PDMS) content were used as the matrix to increase the essential compatibility. The impact of microstructure and macroscopic properties was explored. PMDS promoted the microphase separation of TPU, which increased the essential compatibility in TPVs. The essential compatibilization effect of PDMS made the tensile strength retention proportion of TPV relative to the raw material TPU at 40%, but the elongation at break could reach 192%, which had an excellent toughening effect. Moreover, PDMS made the limiting oxygen index of TPV-323 reach 27%. The analysis of the carbon layer proved that the Si element formed a silicon oxycarbon layer with excellent flame retardancy on the surface.

中文翻译：

一种从根本上提高热塑性聚氨酯/甲基乙烯基硅橡胶基热塑性硫化橡胶相容性的方法

为简化热塑性聚氨酯 (TPU)/甲基乙烯基硅橡胶 (VMQ) 基热塑性硫化橡胶 (TPV) 的生产工艺，采用一系列不同端羟基丁烷基聚二甲基硅氧烷 (PDMS) 含量的嵌段 TPU 作为基体，以增加基本兼容性。探讨了微观结构和宏观性能的影响。PMDS 促进了 TPU 的微相分离，从而增加了 TPV 的基本相容性。PDMS本质上的增容作用使得TPV相对于原料TPU的抗拉强度保持比例为40%，但断裂伸长率可达192%，具有极好的增韧效果。此外，PDMS使TPV-323的极限氧指数达到27%。

更新日期：2022-02-15

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