聚丙烯非织造布的表面功能化研究

A Study of Surface Functionalization of PP Nonwoven Cloth

通过化学引发接枝 4-乙烯基吡啶 ,对聚丙烯非织造布进行表面改性 .研究了不同工艺参数如 4-VP浓度、引发剂浓度、反应温度、反应时间、表面活性剂和界面剂用量对接枝反应的影响 .结果发现 :随着 4-VP浓度的增加 ,接枝率增加 ;当单体浓度为 0 .476mol/L时 ,接枝效率达到最大值 ;当反应温度低于 80℃时 ,随着反应温度的增加 ,接枝率增加 ;表面活性剂的加入可以较大幅度地提高接枝率 ,当其浓度为 1.5 3× 10 -3 mol/L时 ,接枝率从原来的 4.5 %增加到 14.6 % .FTIR的分析结果证明了 4-乙烯基吡啶基团的存在 ,DSC分析证实了接枝反应过程中PP的熔融热和结晶度发生了变化 .

The surface of PP nonwoven cloth was modified through a chemically induced grafting of 4-vinyl pyridine onto it. The effects of different process parameters such as 4-vinyl pyridine concentration, initiator concentration, reaction temperature, reaction time, the use level of interfacial agent and surfactant on graft copolymerization have been investigated. It was found that the graft yield increased with an increase of 4-vinyl pyridine concentration, and the graft efficiency attained maximum when 4-vinyl pyridine concentration was 0.476 mol/L. The graft yield increased with a rise in reaction temperature on the condition of reaction temperature lower than 80 ℃. The graft yield increased greatly with the addition of surfactant, and it rose from 4.5% to 14.6% in the presence of 1.53×10 -3 mol/L surfactant. The presence of 4-vinyl pyridine on the PP nonwoven cloth was characterized by FTIR, and the result of DSC analysis showed that the fusion heat and crystallinity changed in the process of graft reaction.