有机硅弹性体的合成研究  

Synthesis of Silicone Elastomer

作　　者：曾宪仕[1] 严涵[1] 杨延慧[1] 陈红[1] 徐静[1] 康晓梅[1] 张志斌[1] 周先礼[1] 陈世龙 

机构地区：[1]西南交通大学生命科学与工程学院,四川成都610031 [2]浙江凌志精细化工有限公司,浙江杭州311305

出　　处：《化学工业与工程》2011年第6期17-21,共5页Chemical Industry and Engineering

基　　金：教育部新世纪优秀人才支持计划(NECT-08-0820);中央高校基本科研业务费专项资金资助(2010ZT09;SWJTU09CX062);成都尤耐复合材料有限公司资助项目(2008H011442;009H01188;2010H01290)

摘　　要：用二甲基环体硅氧烷(DMC)在阴离子催化条件下开环反应制备了端羟基聚二甲基硅氧烷(HPDMS),将HPDMS与正硅酸已酯(TEOS)在二丁基二月桂酸锡(DBTDL)催化作用下交联合成了有机硅弹性体。研究了不同开环条件对HPDMS黏度的影响以及不同相对分子质量HPDMS的硫化,结果表明,DMC开环聚合发生的最低温度为80℃,阴离子本体聚合HPDMS的适宜工艺条件是:反应温度为120℃,反应时间为80 min,催化剂用量为DMC质量的0.03%。不同黏均相对分子质量的HPDMS硫化性能有较大差异,较低相对分子质量的HPDMS硫化成膜时间较短,且成膜后更柔软,表面更光滑,均匀性更高。但是低相对分子质量的聚合物成膜后较易被拉断。Hydroxyl-terminated polydimethylsiloxane（HPDMS） was synthesized through ring opening reaction of dimethyl siloxane（DMC） under the catalysis of anion.The silicone elastomer was synthesized by coupling reaction between HPDMS and tetraethyl orthosilicate（TEOS） with dibutyl tin dilaurate（DBTDL） as catalyst.The effects of different ring-opening reaction conditions on the viscosity of HPDMS and the vulcanization of HPDMS with different molecular weight were investigated.The results showed that the temperature of ring-opening polymerization of DMC was above 80 ℃.The optimal conditions of the synthesis of HPDMS by anionic polymerization were： reaction temperature was 120 ℃,reaction time was 80 min,catalyst content was 0.03%（w/w）.The vulcanization properties of HPDMS with different viscosity-average molecular weight were quite different.Low molecular weight HPDMS had short vulcanization time and the film obtained was more flexible with more smooth surface and higher uniformity.However,it was more easily to be broken.

关 键 词：DMC 弹性体 黏度 影响因素 

分 类 号：TQ219[化学工程—有机化工]