LMPB-g-KH-570改性纳米氮化硅/丙烯酸酯橡胶复合材料的制备与性能研究

摘要

采用溶液聚合法将硅烷偶联剂KH-570接枝到低相对分子质量的聚丁二烯液体橡胶(LMPB)分子长链中,合成了新型大分子表面处理剂LMPB-g-KH-570,用其对纳米氮化硅进行表面改性,制备改性纳米氮化硅/丙烯酸酯橡胶(ACM)复合材料,并对其结构和性能进行研究.结果表明:LMPB-g-KH-570与纳米氮化硅发生了化学键合；在复合材料中加入适量LMPB-g-KH 570,可以改善纳米氮化硅在复合材料中的分散性,提高复合材料的物理性能.%A new macromolecular coupling agent LMPB-g-KH-570 was synthesized by grafting si-lane coupling agent KH-570 onto low molecular weight liquid polybutadiene rubber (LMPB) via solution polymerization. The surface of nano-silicon nitride was modified by LMPB-g-KH-570, and the modified nano-silicon nitride/ACM composite was prepared. The structure and properties of the composite were investigated. The results showed that,LMPB-g-KH-570 was chemically bonded with nano-silicon nitride;by adding proper level of LMPB-g-KH-570,the dispersion of nano-silicon nitride in the composite and the physical properties of the composite were improved.