用MI值评价聚丙烯的可纺性初探

STUDY ON THE MI VALUES OF POLYPROPYLENE TO DETERMINATE ITS SPINNABILITY

通过三个牌号聚丙烯２３０～２６０℃的ＭＩ值曲线分析，发现ＭＩ值温度曲线和分子量重量分数曲线有对应关系，可以用其曲线的形状来评价其可纺性。试验结果，Ⅰ号样品的曲线较平稳，可纺性较好，Ⅲ号样品曲线斜率出现突变，可纺性较差。

With analysising the MI values of PP at 230～260℃,it was found that PP MI-temperature curves were relat-ed to the curves of PP molecular weight distribution on weight basis. So we can estimate the spinnability ofPP using the MI-temperature curves.