摘要
考察了无水AlCl3用量对PP、PS大分子间Friedel-Crafts烷基化反应及PP/PS合金性能的影响。通过扭矩分析、接枝比和力学性能测定、界面形态的观察,结果表明,加入适量的无水AlCl3可以引发PP、PS间的Friedel-Crafts烷基化反应,生成的PP-g-PS接枝物能起到就地增容PP/PS的作用,使合金的力学性能得到显著提高;加大AlCl3用量后,由于其引起的PS、PP分子链的断链反应起主导作用,合金的性能降低。
Effects of the amount of anhydrous aluminum chloride （AlCl3） on Friedel-Crafts alkylation reaction between polypropylene（PP） and polystyrene（PS） and properties of PP/PS blends were examined. The study on mechanic properties and interface morphology of PP/PS blends in the presence of AlCl3 showed that, with moderate catalyst amount, a copolymer of PP-g-PS can be formed during melt blending of PP/PS blends via a Friedel-Crafts benzene ring alkylation. The grafting co-polymer behaves as a compatilizer of PP/PS blends and improves their mechanical properties. However, when the amount of AlCl3 is increased, the properties of blends become worse due to the chain scission of PS and PP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第3期57-60,共4页
Polymer Materials Science & Engineering
基金
江苏省自然科学基金资助项目(BK2003028)
