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首页> 外文期刊>Journal of Applied Polymer Science >COMPARISON OF RUBBER REINFORCEMENT USING VARIOUS SURFACE-MODIFIED PRECIPITATED SILICAS
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COMPARISON OF RUBBER REINFORCEMENT USING VARIOUS SURFACE-MODIFIED PRECIPITATED SILICAS

机译：各种表面改性硅橡胶对橡胶补强的比较

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摘要

The reinforcement of a natural rubber compound by various surface-modified precipitated silicas was compared. Compound physical properties were determined for two silicas differing in surface area and were used as controls to evaluate these silicas after surface modification by using either a bifunctional organosilane coupling agent (gamma-mercaptopropyl-trimethoxysilane) or a new surface modification process. This new process is based on the in situ polymerization of organic monomers solubilized inside surfactant bilayers that are adsorbed onto the silica surface to afford silicas modified with styrene-butadiene and styrene-isoprene copolymers. Both surface modification processes afford materials that dramatically increase the compound cure rate, thereby significantly reducing T-90 cure times, while also improving tensile properties, tear strength, abrasion resistance, and compression set of the cured compound. The silane-modified silica gives a higher flex-cracking resistance than do the silicas modified by the in situ polymerization of organic monomers, whereas these latter silicas significantly increase rebound resilience and offer greater overall improvements in rubber compound performance. The rubber compound physical properties obtained using the modified, higher surface area Hi-Sil(R) 255 silica are generally improved relative to those obtained using the modified Hi-Sil(R) 233 silica. (C) 1996 John Wiley & Sons, Inc. [References: 23]
机译：比较了各种表面改性的沉淀二氧化硅对天然橡胶混合物的增强作用。确定了两种表面积不同的二氧化硅的化合物物理性质，并用作对照，以通过使用双官能有机硅烷偶联剂（γ-巯基丙基-三甲氧基硅烷）或新的表面改性方法对这些二氧化硅进行表面改性。该新方法基于溶解在表面活性剂双层内部的有机单体的原位聚合，该有机单体被吸附在二氧化硅表面上，从而得到用苯乙烯-丁二烯和苯乙烯-异戊二烯共聚物改性的二氧化硅。两种表面改性工艺均可提供可显着提高化合物固化速率的材料，从而显着减少T-90固化时间，同时还可提高固化化合物的拉伸性能，撕裂强度，耐磨性和压缩永久变形。硅烷改性的二氧化硅比通过有机单体原位聚合改性的二氧化硅具有更高的抗挠裂性，而这些后者的二氧化硅显着提高了回弹性，并在橡胶胶料性能方面提供了更大的整体改善。与使用改性的Hi-Sil 233二氧化硅获得的那些相比，使用改性的较高表面积的Hi-Sil 255二氧化硅获得的橡胶化合物的物理性能通常得到改善。 （C）1996 John Wiley＆Sons，Inc. [参考：23]

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