摘要
以苯基甲氧基硅烷和甲基甲氧基硅烷为原料,用水解缩合法制备硅树脂阻燃剂,通过对反应时间、反应温度、催化剂量和封端时间等因素的正交实验分析,优化硅树脂阻燃剂制备条件.结果表明:硅树脂具有良好的热稳定性,在800℃、N2气氛下,热失重低于39%,其热稳定性越好,对聚碳酸酯(PC)的阻燃效果越佳.在PC中添加5%(质量)优化条件制得的硅树脂就能使其氧指数(OI)从26·0提高到34·0.
Silicone flame retardants were synthesized through co-hydrolysis condensation reaction by using methoxysilanes with methyl and phenyl groups as the raw materials. The synthesis process was studied and optimized through orthogonal analysis of the reaction temperature, reaction time, catalyst quantity, and blocking time. The results indicated high thermal stability of the silicone. The mass loss was less than 39% at 800℃ in nitrogen atmosphere. Further more, the study showed that higher thermal stability of the silicone made it an effective flame retardant for polycarbonate. The oxygen index of polycarbonate was increased from 26.0 to 34.0 when 5% （mass） silicone made by this optimized conditions was added.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第9期2218-2222,共5页
CIESC Journal
基金
浙江省科技计划重点科研项目(2006C21084).~~
关键词
甲基苯基硅树脂
聚碳酸酯
阻燃
热稳定性
silicone with methyl and phenyl
polycarbonate
flame retardancy
thermal stability
