马来酸酐/丙烯酸丁酯双单体接枝聚丙烯

Simultaneous Graft Polymerization of Polypropylene with Maleic Anhydride and Butyl Acrylate

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。

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 （1.34 mmol/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.