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硅氧烷弹性体是一种独特的合成聚合物,其主链由“无机”重复单元(即硅-氧键)组成。另外,硅原子与有机基团连接,例如甲基。无机和有机单元的存在赋予聚硅氧烷独特的性能以及热稳定性和化学稳定性。在极端温度下,其拉伸强度、拉断伸长率、撕裂强度和压缩永久变形远胜于传统橡胶。有机橡胶(NR、SBR、BR等)具有碳-碳主链,因而易受到臭氧、UV、热和其他老化因素的影响,而硅氧烷橡胶对这些因素的抗耐性很好。
Silicone elastomers are a unique synthetic polymer whose backbone consists of “inorganic ” repeating units (ie, silicon-oxygen bonds). In addition, the silicon atom is attached to an organic group, such as methyl. The presence of inorganic and organic units gives the polysiloxane unique properties as well as thermal and chemical stability. At extreme temperatures, its tensile strength, elongation at break, tear strength and compression set far outperform conventional rubber. Organic rubbers (NR, SBR, BR, etc.) have a carbon-carbon backbone and are therefore susceptible to ozone, UV, heat and other aging factors, whereas silicone rubbers are very resistant to these factors.