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首页> 外文期刊>Journal of Applied Polymer Science >Effects of Polymeric Curing Agent Modified with Silazanes on the Mechanical Properties of Silicone Rubber
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Effects of Polymeric Curing Agent Modified with Silazanes on the Mechanical Properties of Silicone Rubber

机译：硅氮烷改性的聚合物固化剂对硅橡胶力学性能的影响

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摘要

Polymeric Curing agent modified with hexamethyldisilazane (PCA-D), or with hexamethylcyclotrisilazane (PCA-T), was used to improve the mechanical properties of hydroxyl-teminated polydimethylsiloxane (PDMS) rubber. The structure and the gel time of PCA were characterized by Si-29 NMR and shear viscosity measurement, respectively. The PCA modified with silazanes was more stable in storage than that without treatment (PCA-0). Chemical bonds were formed during the reaction of silazanes and PCA according to Si-29 NMR results. The crosslink density (gamma(e)) and the mechanical properties of PCA/PDMS rubber were determined by swelling equilibrium and stress-strain tests. It was found that PCA treated with both silazanes could better enhance the mechanical properties of PCA/PDMS rubber compared with PCA-0. PCA-T/PDMS rubber, with additional crosslinks, was the best among the three types of PCA/PDMS rubber on the mechanical properties. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 1057-1062, 2009
机译：用六甲基二硅氮烷（PCA-D）或六甲基环三硅氮烷（PCA-T）改性的聚合物固化剂可改善羟基封端的聚二甲基硅氧烷（PDMS）橡胶的机械性能。 PCA的结构和胶凝时间分别通过Si-29 NMR和剪切粘度测量来表征。用硅氮烷改性的PCA与未处理的PCA（PCA-0）相比更稳定。根据Si-29 NMR结果，在硅氮烷与PCA反应期间形成了化学键。通过溶胀平衡和应力应变测试确定了PCA / PDMS橡胶的交联密度（gamma（e））和机械性能。发现与两种PCA-0相比，用两种硅氮烷处理的PCA可以更好地增强PCA / PDMS橡胶的机械性能。就机械性能而言，具有三种交联键的PCA-T / PDMS橡胶是三种PCA / PDMS橡胶中最好的。 （C）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：1057-1062，2009

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