接枝法制备聚苯乙烯/笼型倍半硅氧烷复合材料

Garfting of Polyhedral Oligomeric Silsesquioxane onto Polystyrene-Matrix

以工业级的3-氯丙基三氯硅烷和七聚(苯基)倍半硅氧烷三硅醇钠为原料,通过顶端封角法合成了含有一个3-氯丙基、七个苯基的单官能团POSS(3-氯丙基POSS),并以其作为聚苯乙烯的添加剂,采用化学接枝的方法制备POSS/PS复合材料。利用傅立叶转变红外光谱(FT-IR)、核磁共振(~1H-NMR ^(29)Si-NMR)和X-射线衍射(XRD)技术对中间产物和笼型倍半硅氧烷(POSS)/聚苯乙烯(PS)的结构及组成进行了表征。研究表明,POSS分子能成功地接枝到聚苯乙烯主链上,且POSS分子以分子级水平均匀分散在聚苯乙烯基体中。

The monofunctional-polyhedral oligomeric silsesquioxane （POSS） molecule containing one single 3- chloropropyl group was synthesized by the comer-capping method using industrial raw material of phenyltrichlorosilane and heptaphenyltricycloheptasiloxane trisodium silanolate, which was used as filler to modify the functional polystyrene to prepare POSS/polystyrene （PS） composite. The structures of the all intermediates and POSS/PS composite were well characterized by nuclear magnetic resonance spectrum （1H-NMR, 29 Si-NMR）, Fourier transform infrared spectrum（FT-IR） and X-ray diffraction （XRD）. The results show that the condensation reaction of 3-chloropropylheptaisooctyl-POSS with the functional PS is efficient, and POSS molecule is well dispersed in the composite.