摘要
采用羟基封端聚硅氧烷与甲氧基硅烷为原料在催化剂作用下通过缩聚反应制备了甲氧基封端聚硅氧烷,通过红外光谱,核磁共振仪对其化学结构进行表征,采用容量法研究了反应前后羟基含量的变化,考察了反应条件对该反应的影响规律.研究结果表明,最佳的反应条件:羟基与甲氧基摩尔比为1∶10,催化剂选用二月桂酸二丁基锡,用量为1.2%(质量百分数),反应温度为80℃,反应时间为6h.
Methoxy-terminated polysiloxane is prepared by polycondensation with hydroxy-terminated polysiloxane , methoxysilane and catalyst . The chemical structure of the product is characterized by IR and 1 H-NMR . The hydroxyl content before and after the reaction is studied by volumetric method .The effects of the reaction conditions on the reaction are investigated .The results show the optimum reaction conditions ,namely ,the mole ratio of hydroxy and methoxy is 1∶10 ,dibutyltin dilaurate is used as the catalyst with the amount 1 .2% （mass percentage） ,the reaction temperature is 80℃ , and the reaction time is 6h .
出处
《杭州师范大学学报（自然科学版）》
CAS
2014年第2期123-127,152,共6页
Journal of Hangzhou Normal University(Natural Science Edition)
基金
浙江省重点科技创新团队"有机硅创新团队"项目(2009R50016)
关键词
甲氧基封端聚硅氧烷
羟基封端聚硅氧烷
甲氧基硅烷
缩聚反应
methoxy-terminated polysiloxane
hydroxy-terminated polysiloxane
methoxysilane
polycondensation reaction
