核壳结构对聚苯乙烯/聚丙烯酸酯LIPN力学性能的影响

The Effect of Core-Shell Structure on the Mechanical Properties of PS/PA LIPN

本文系统研究了核壳结构对聚苯乙烯/聚丙烯酸酯(PS/PA)LIPN力学性能的影响.通过改变加料顺序、溶胀时间及双相互穿等多步聚合方法,考察了动态力学和力学性能变化的规律.结果表明,核壳结构随加料顺序的变化,导致力学性能相差十分悬殊.增加溶胀时间及采用多步聚合的双相互穿,能明显地提高互穿程度,使玻璃化温度发生内移,力学性能得到改善.

The effect of core-shell structure on the mechanical properties of PS/PA LIPN was systematically studied.Their dynamic mechanical and mechanical properties were investigated via changing feeding order and swelling time as well as using the method of multistage polymerization for interpene-tration.The results reveal that changing the feeding order leads to the change of core-shell structure.and then the great disparity in mechanical properties.The increase of swelling time and the use of multistage polymerization for interpenetrating evidently enhance the degree of interpenetration,therefore result in the inward shift of Tg and the improvement of mechanical properties.