羟甲基丙烯酰胺熔融接枝聚丙烯亲水性的研究

分别以羟甲基丙烯酰胺（NHA）、苯乙烯（St）为接枝单体，过氧化二异丙苯（DCP）为引发剂，用双螺杆挤出机制备了聚丙烯（PP）的接枝共聚物PP-g-NHA和PP-g-NHA/St。红外分析表明，NHA和St接枝到PP链上形成接枝共聚物。探讨了NHA用量、St用量、DCP用量及加工温度、螺杆转速对接枝率及接触角的影响。结果表明，NHA的最佳用量是3 %，此时接枝率达到最大值为1.6 %，接触角最小为83 °；随着DCP用量的增加，接枝率先增大后下降；加工温度不能太高，螺杆转速一定要大于40 r/min。

Study on Hydrophilicity of Hydroxymethyl Acrylamide Grafted Polypropylene

PP-g-NHA and PP-g-NHA/St have been prepared via melt grafting by using a twin-screw extruder using dicumyl peroxide (DCP) as an initiator. FTIR confirmed the grafting of NHA and St onto polypropylene (PP) chains. The effect of the content of monomer, initiator, extrusion temperature, and screw speed on the grafting degree and the resulted contact angle of grafted PP were investigated. When the content of NHA was 3%, the obtained grafting degree and contact angle were 1.6 % and 83°, respectively. With increasing loading of DCP, the grafting degree increased and then decreased. The screw speed should be higher than 40 r/min.