以六氟异丙醇为溶剂的聚甲醛凝胶渗透色谱研究
The Gel Permeation Chromatography Investigation of Polyoxymethylene -hexafluoroisopropanol System
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摘要: 研究了均聚和共聚甲醛在六氟异内醇中的凝胶渗透色谱（ＧＰＣ）。对共聚甲醛出现的缔合现象从主链结构作了解释，并找到了避免缔合的方法；对共聚甲醛ＧＰＣ淋洗曲线上的异常小峰从聚合机理角度进行了探讨，推测得到小峰所对应的物质。确定了以六氟异丙醇为溶剂的聚甲醛的凝胶色谱表征方法，并探索采用凝胶色谱－粘度计联用法得到分子量和分子量分布结果。Abstract: The gel permeation chromatography(GPC)of polyoxymethylene(POM)-hexafluoroisopropanol(HFIP)system has been studied.The aggregation phenomenon of POM in HFIP was observed and successfully explained from the main chain structure of POM.The deaggregation can
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