超声波作用下PP固相接枝马来酸酐研究

Effect of specific surface and ultrasonic wave on the solid grafting reaction of maleic anhydride-grafted polypropylene

本实验利用超声波的分散原理,利用固相法粉末状聚丙烯接枝马来酸酐,以水为分散剂,丙酮为相面相溶剂,过硫酸氨[(NH)42S2O8]为引发剂,制备MAH固相接枝PP。研究了引发剂ASP用量、单体MAH用量、反应时间和比表面积等对接枝物接枝率的影响。结果表明,MAH的接枝率随引发剂APS用量的增加而先增加后下降;随MAH用量的增大,产物的接枝率先增大,当达到一个最高值后随着MAH用量的进一步增大,接枝率反而下降,但下降得并不明显。

In this paper, based on the dispersion principle of ultrasonic ware, the solid grafting reaction of maleic anhydride （MAH） onto PP was studied. The influence of reaction temperature and time, concentrations of （NH4）2S2O8 and MAIl and other elements on the grafting rate were studied. Basic on that, the effect of different specific surface of polypropylene to the result also was studied. The graft degree of MAH increased with increasing APS Concentration and then decreased when it added more. The MAIl graft degree of the resulting polymer was drastically increased with increasing MAtt Concentration. It reached a maximum while adding more MAH, and then it decreased afterward. The grafting ratio of MAIl was not changed obviously.