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以1,3,5,7,9,11,13-苯基-15-氯丙基笼型倍半硅氧烷(POSS-Cl)与二乙醇胺进行反应,将末端氯基团转化为两个端羟基,通过羟基与2-溴代异丁酰溴的酯化反应得到POSS-(Br)2引发剂,并运用原子转移自由基聚合(ATRP)成功合成了一种新型POSS/PS复合材料。采用傅里叶红外(FTIR)、核磁共振(NMR)等手段对POSS和POSS/PS的结构进行了表征。通过差示扫描量热(DSC)和热失重(TGA)分析对POSS/PS复合材料的热性能进行了研究。结果表明:POSS单元的引入能显著提高聚合物的热稳定性。
Reaction of 1,3,5,7,9,11,13-phenyl-15-chloropropylcyclotetrasiloxane (POSS-Cl) with diethanolamine converted the terminal chloro group into two (POSS- (Br) 2) was synthesized by the esterification of hydroxyl with 2-bromoisobutyryl bromide. A novel POSS / PS composite was successfully synthesized by atom transfer radical polymerization (ATRP). The structures of POSS and POSS / PS were characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The thermal properties of POSS / PS composites were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results show that the introduction of POSS units can significantly improve the thermal stability of the polymer.