摘要
在固体酸催化下,以苯基三乙氧基硅烷（PTES）、二甲基二乙氧基硅烷（DMES）、四甲基环四硅氧烷（D4^H）、八甲基环四硅氧烷（D4）、六甲基二硅氧烷（MM）和四甲基二硅氧烷（D2^H）为主要原料,通过水解缩聚法合成了一系列Si—H键、D链节含量分别不同的含氢苯基硅树脂HPSR。用傅里叶变换红外光谱（FT-IR）和核磁共振氢谱（1^ H NMR）对其进行了结构表征。将所制的HPSR与乙烯基硅橡胶VPS以n（Si—H）∶n（Vi）=1.2∶1.3的摩尔比混合,并加入剂量的络合铂催化剂、铂抑制剂,以及占总质量10%的白炭黑和钛白粉,在160℃下固化10-15min即制得透明的耐高温硅橡胶涂层,并对其耐热性和力学性能进行研究。结果表明,当HPSR分子中Si—H键含量为5mmol/g,MD∶MR=10%时,对应制备的涂层耐热性、柔韧性以及力学性能最佳。
The hydrogen containing phenyl silicone resin（HPSR）was synthesized with hydrolysis-polycondensation method from phenyltriethoxysilane（PTES）,methyltriethoxysilane（MTES）,teteamethylcyclotetrasiloxane（D4^H）,octamethylcyclotetrasioxane（D4）,hexamethyldisiloxane（MM）and teteamethyldisiloane（D2^H）in the presence of solid acid catalyst,which has different content of Si—H and D chain respectively.The structure of the polymer was characterized through FT-IR and 1^ H NMR.The HPSR and vinyl silicone rubber（VPS）was mixed with the molar ratio of n（Si—H）∶n（Vi）=1.2∶1.3,together with the dose of Pt catalyst,Pt inhibitor,and 10% of silica and titanium dioxide,the high temperature silicone rubber coating was successively prepared with 160 ℃ sustained 10-15 min,and the high temperature and mechanical properties were also studied.the results showed that when content of HPSR Si—H was 5mmol/g,MD∶MR=10%,high resistance,flexibility and mechanical properties of the coating were the best.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2016年第9期9192-9196,共5页
Journal of Functional Materials
关键词
硅树脂
耐高温
柔韧性
力学性能
涂层
silicone resin
high resistance
flexibility
mechanical properties
coating
