Herein an efficient approach to produce functional polypropylene via solvent assisted solid-phase grafting process is reported, in which acrylic acid, methyl methacrylate and maleic anhydride are used as multi-monomers, 2,2′-azobis(2-methylpropionitrile) as initiator and ether as swelling solvent and carrier. The effects of various factors such as the swelling solvent species and dosage, swelling time and temperature, monomer and initiator concentrations, reaction time and temperature, nitrogen flow rate and the stirring speed on the grafting percentage and grafting efficiency were investigated. To verify the polar species was grafted onto polypropylene, the resulted polymers were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, water contact angle measurement, tensile strength and melt flow rate measurement. All the results showed that using the ether assisted solid-phase free radical grafting process is an efficient and versatile approach to produce functional polypropylene.

本文报道了一种通过溶剂辅助固相接枝法生产功能性聚丙烯的有效方法，其中以丙烯酸、甲基丙烯酸甲酯和马来酸酐为多单体，2,2'-偶氮二(2-甲基丙腈)为引发剂，乙醚作为溶胀溶剂和载体。考察了溶胀溶剂种类和用量、溶胀时间和温度、单体和引发剂浓度、反应时间和温度、氮气流量和搅拌速度等因素对接枝率和接枝效率的影响。为了验证极性物质接枝到聚丙烯上，通过傅里叶变换红外光谱、扫描电子显微镜、X射线衍射分析、水接触角测量、拉伸强度和熔体流动速率测量对所得聚合物进行了表征。所有结果表明，使用醚辅助固相自由基接枝工艺是生产功能性聚丙烯的一种高效且通用的方法。