【摘要】 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。更多还原

【Abstract】 The performance of plastics can be improved by blending with nano-filler.However,the compatibility between plastics and nano-filler is low.So,it is necessary to make a surface modification to nano-filler.First,γ-methacryloxy propyltriethoxysilane(MPTES) was used as silane coupling agent to introduce vinyl groups onto surfaces of the nano-titania.The modified nano-titania was copolymerized with styrene by suspension polymerization.The morphology of copolymerized nano-titania was characterized by FT-IR,SEM and AFM.Quantity analysis was carried out by TG.The results showed that the surface of the nano-titania could be covered by PS chains efficiently.更多还原