摘要
研究了有机侧基对硅橡胶低温性能的影响。压缩耐寒系数实验表明,大体积有机侧基基团的引入可破坏硅橡胶的低温结晶;DMTA分析表明,当大体积基团数目达到一定数量时,可破坏低温结晶,甚至使低温结晶完全消失,成为非结晶橡胶;在有机侧基中,选择合适的改性链节并调节其含量,可提高硅橡胶的玻璃化转变温度,如随苯基和三氟丙基取代基的增加玻璃化转变温度升高。
The effect of organic side-group on the low temperature-resistance of silicone rubber was investigated. The cold-resistance results showed that the bulky side-group could destroy the crystal of silicone rubber at low-temperature. The DMTA tests showed that when the number of bulky sidegroup was increased to a certain value, the low-temperature crystal properties of silicone rubber was destroyed completely, and non-crystal rubber was formed. For different organic side-groups, the selection of appropriate modified-chains and the adjustment of their content could increase the glass transition temperature （Tg）. For example, with the increasing of phenyl and trifluoropropyl substitute, the Tg was risen.
出处
《特种橡胶制品》
2010年第4期17-19,23,共4页
Special Purpose Rubber Products
关键词
硅橡胶
低温性能
苯基硅橡胶
氟硅橡胶
silicone rubber
low temperature property
phenyl-silieone rubber
fluorinatedsiliconerubber
作者简介
作者简介：黄艳华（1978-），女，工程师，主要从事硅橡胶、氟硅橡胶等特种橡胶材料的应用研究。
