界面剂与共聚单体对固相接枝聚丙烯表面性质的影响

Influence of interfacial agent and comonomer on surface performance of solid-phase grafting polypropylene

采用固相接枝方法,研究了以二甲苯为界面剂,以苯乙烯(St)、丙烯酸丁酯(BA)为接枝共聚单体对马来酸酐接枝聚丙烯(PP-g-MAH)表面性能的影响。研究结果表明,随着二甲苯用量的增加,PP- g-MAH的表面能和极性力分量呈先升后降的趋势,当w(二甲苯)=15%时,表面能(37.52 mN/m)和极性力分量(2.47 mN/m)均达到最大值;共聚单体St、BA的加入可以显著提高PP-g-MAH的表面能和极性力分量,共聚单体St的作用更为有效,其接枝物的极性力分量分别是PP-g-(MAH-co-BA)的2倍,PP- g-MAH的4.8倍。

The influences of xylene, styrene （St） and butyl acrylate （BA） on the surface performance of polypropylene grafted by maleic anhydride （PP-g-MAH） were studied by solid-phase graft copolymerization with xylene as interfacial agent, and St and BA as graft comonomer. The research results showed that the surface energy and polar component of PP-g-MAH had trend of rise-fall with the increase of xylene content, the surface energy （37.52 mN/m） and polar component（2.47 mN/m） were all maximum value when mass fraction of xylene was 15%. The surface energy and polar component of PP-g-MAH were obviously increased when comonomer St or BA was introduced in systems, the action of comonomer St was more than of comonomer BA because the polar component of PP-g- （MAH-co-St） were twice over that of PP-g- （MAH-co-BA） and 4.8 times over that of PP-g-MAH, respectively.