改性剂对TiN/PS纳米复合材料流变行为的影响

Effect of Modifiers on the Rheological Behavior of TiN/PS Nanocomposites

分别以γ-甲基丙烯酰氧基丙基三甲氧基硅烷(MAPTMS)和大分子St/AN/MAPTMS无规共聚物为改性剂对纳米TiN进行表面预处理,再将其与聚苯乙烯(PS)复合,通过熔融挤出法制备TiN/PS纳米复合材料。研究了改性剂种类对纳米TiN增强复合材料熔融流变性能、热性能和纳米粒子分散性能的影响。实验结果发现大分子改性剂处理TiN增强PS复合材料的玻璃化转变温度、热分解温度和粒子均匀分散稳定性均高于MAPTMS,大分子处理TiN增强PS复合材料的界面黏结作用更强;受纳米TiN与PS基体界面黏结效果的影响,大分子改性剂修饰TiN增强PS体系的储能模量和复数黏度增大更为明显。

TiN reinforced PS nanocomposites were prepared by melt extrusion method,in which the nano TiN was pretreated byγ-methacryloxypropyl trimethoxy silane(MAPTMS)and macromolecular random copolymer St/AN/MAPTMS,and then blended with polystyrene(PS).The effects of modifiers type on the melt rheological properties,thermal performance and dispersion of nanoparticles of nano TiN reinforced compo-sites were studied.The experimental results discovered that the glass transition temperature,thermal decomposition temperature and uniform dispersion stability of particles of nano TiN reinforced PS composites treated with macromolecular modifier were higher than those of MAPTMS.It indicated that the macromolecular modifier had strongest interfacial bonding effect for TiN reinforced PS nanocomposites.Affected by the interfacial bonding effect between nano TiN and PS,the increase of storage modulus and complex viscosity of the TiN reinforced PS system modified with macromolecular modifier were more obvious.