分子结构对室温硫化硅橡胶泡沫材料影响的研究  

Influence of molecular structure on room-temperature vulcanized silicone rubber foam materials

作　　者：刘芳[1] 罗世凯[1,2] 赵祺[2] 邓志华[2] 孙素明[2] 刘天利[2] 余凤湄[2] 

机构地区：[1]西南科技大学,四川绵阳621900 [2]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《现代化工》2014年第6期76-79,共4页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(11302197)

摘　　要：采用不同苯基结构或含量的端羟基聚有机硅氧烷为生胶,制备了4种密度相近的室温硫化硅橡胶泡沫材料,就生胶分子结构对硅橡胶的硫化特性、泡沫材料的泡孔结构及压缩性能的影响进行了研究。结果表明,端羟基聚有机硅氧烷分子中的苯基对室温硫化硅橡胶的硫化性能以及泡沫材料的泡孔结构和压缩性能有明显的影响,苯基的位阻效应会降低胶料的硫化速率,有利于获得泡孔细小均匀的泡沫材料,同时降低泡沫材料的应力松弛率。Four kinds of room-temperature vulcanized silicone rubber foam materials with similar density are prepared by using polydimethylsiloxanes with different phenyl structures or contents.The influences of rubber structure on the curing characteristics of silicone rubber,bubble structure and compressive property of the resulting foam material are studied.The results show that the phenyl in hydroxyl-terminated polydimethylsiloxane has obvious effect on the roomtemperature vulcanized silicone rubber＇s curing characteristics,the bubble structure of foam material and the compression performance.The steric hindrance effect of phenyl can reduce the rate of vulcanizing of silicone rubber.It is beneficial to obtain uniform and small bubbles,along with reducing the stress relaxation of foam materials.

关 键 词：室温硫化硅橡胶 泡沫材料 泡孔结构 压缩性能 

分 类 号：O643.41[理学—物理化学]