论文部分内容阅读
纳米填料与塑料共混,可以改善塑料的强度、韧性。但是纳米填料与塑料的相容性差,需要对纳米材料进行表面改性。采用硅烷偶联剂γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷对纳米TiO2进行表面处理,在其表面引入双键,然后与苯乙烯共聚,制备表面接枝聚苯乙烯的纳米TiO2粒子,拟用于聚苯乙烯抗冲击改性。采用红外光谱、扫描电镜、原子力显微镜对接枝聚合后的纳米TiO2粒子的形貌进行观察,并且采用热失重分析法定量表征纳米材料表面的接枝率。结果表明:通过悬浮聚合,TiO2粒子表面成功接枝聚合了聚苯乙烯。
Nano filler and plastic blend, can improve the strength of plastic, toughness. However, the compatibility of the nano-filler and the plastic is poor, and the nano-material needs to be surface-modified. The nano-TiO2 was surface-treated with silane coupling agent γ- (methacryloyloxy) propyltrimethoxysilane, a double bond was introduced on the surface of the nano-TiO2, and then copolymerized with styrene to prepare a nano-surface-grafted polystyrene TiO2 particles, intended for polystyrene impact modification. The morphology of the nano-sized TiO2 particles after grafting polymerization was observed by infrared spectroscopy, scanning electron microscopy and atomic force microscopy. The grafting ratio of the nano-particles was quantitatively characterized by TG analysis. The results showed that polystyrene was successfully grafted onto the surface of TiO2 particles by suspension polymerization.