用傅立叶红外光谱、热失重分析、动态流变等方法研究了聚苯乙烯(PS)/线型低密度聚乙烯(LLDPE)大分子之间的Friedel-Crafts烷基化反应.结果表明,在PS/LLDPE(质量比80/20)共混物中加入0.4%的AlCl<,3>,有利于生成较多LLDPE-g-PS接枝物,其接枝百分比达30.9%,与简单共混体系相比,增容体系力学性能得到明显提高,其拉伸强度从14.1 MPa提高至20.0 MPa,断裂伸长率从4.2%提高至12.1%;热重分析显示,其最大分解速率温度提高ll℃;动态流变行为显示,在低频率(ω)区域,原位增容合金的动态储能模量(G')、损耗模量(G")和复数黏度(η<'*>)高于简单共混物,损耗正切(tanδ)低于简单共混物.
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