摘要
以工业级的乙烯基三甲氧基硅烷为原料,通过硅烷水解法合成出低成本的八乙烯基笼形倍半硅氧烷(OVPOSS),并采用种子乳液聚合法成功地制备了OVPOSS/聚苯乙烯(PS)复合材料。采用傅立叶转变红外光谱(FT-IR)、核磁共振(1H-NMR)和X射线衍射(XRD)等对OVPOSS和OVPOSS/PS复合材料的化学组成和结构进行了表征。透射电镜(TEM)观察到OVPOSS/PS复合粒子微球粒径约为300nm,而且POSS分子在聚苯乙烯基体中分散性较好。此外,差示扫描量热仪(DSC)、热失重分析(TGA)测试结果表明,由于POSS的引入,形成的交联网络结构的OVPOSS/PS复合材料的初始分解温度比纯PS的提高了40℃、玻璃化转变温度提高14℃。
Octavinyl polyhedral oligomeric silsesquioxane （OVPOSS） was synthesized through hydrolytic condensation of industrial raw material of vinyltrimethoxysilane,and OVPOSS/ polystyrene （PS） composites were prepared by seed emulsion polymerization. The structure and the composition of OVPOSS and OVPOSS/PS composites were well characterized by Fourier transform infrared spectroscopic （FT-IR）,nuclear magnetic resonance （1H-NMR） and X-ray powder diffraction （XRD）. The results prove that OVPOSS is successfully synthesized and further confirmed the incorporation of POSS into the PS matrix. Transmission electron microscopy （TEM） images show that the OVPOSS/PS composite paticles have an uniform size of about 300 nm and OVPOSS is well dispersed in the composites. The thermal properties were investigated by differential scanning calorimetry （DSC） and thermal gravimetric analysis （TGA）. The data indicates that mainly due to the incorporation of POSS unit,the glass transition temperature （Tg） and initial decomposition temperature （Tdec） of OVPOSS/PS composites are 40 ℃ and 14 ℃ respectively,which are higher than that of the pure PS.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第12期8-11,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50673023)
关键词
种子乳液聚合
笼形倍半硅氧烷
聚苯乙烯
热性能
seed emulsion polymerization
polyhedral oligomeric silsesquioxane
polystyrene
thermal property
