【摘要】 采用熔融法进行马来酸酐(MAH)和丙烯酸丁酯(BA)双单体接枝聚丙烯(PP)的研究。结果表明,在一定工艺条件下,仅添加一单体马来酸酐时,接枝率G在其加入量为4%(质量分数)时达到最大(0.65 mmol/g PP);马来酸酐添加量保持不变,接枝率随第二单体丙烯酸丁酯添加量增加而出现一极值(1.34 mmol/g PP),比一单体接枝聚丙烯的接枝率高出一倍,并高于文献值(0.36 mmol/g PP)。经红外光谱、热失重分析和差示扫描量热分析表明,马来酸酐、丙烯酸丁酯均与聚丙烯发生接枝反应,并且以短支链的形式连接在PP的主链上。更多还原

【Abstract】 Simultaneous graft polymerization of polypropylene(PP) with two different monomers,maleic anhydride(MAH) and butyl acrylate(BA),using melting method was studied.Experimental results revealed that: if the grafting modification of PP was carried out only with MAH,the grafting degree(G) reached a maximum(0.65 mmol/g PP) when the dosage of MAH was 4%(mass ratio).In the co-grafting process,with the dosage of MAH at a constant amount(4%,mass ratio),it was found that the grafting degree attained a maximum(1.34mmol/g PP) when the amount of BA was 3%(mass ratio),which is double that with one monomer and higher than the value(0.36mmol/g PP) ever reported.Characterization by chemical titration,IR,DSC and TGA revealed that both MAH and BA are grafted with PP as short-chain branches.更多还原