蒸汽压渗透法在聚膦腈相对分子质量测定中的应用  

Measurement of molecular weights of polyphosphazenes by vapor pressure osmometry

作　　者：殷跃凡[1] 李跃明[1] 李艳梅[1] 吴汉福[1] 龚晓莹[1] 毕韵梅[1] 

机构地区：[1]云南师范大学化学化工学院

出　　处：《云南大学学报（自然科学版）》2008年第3期281-285,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(20364002);中国科学院“西部之光”人才培养计划基金;云南省自然科学基金(2005B0027M);云南省教育厅科学研究基金资助项目(5Z0088A)

摘　　要：用蒸汽压渗透法,探讨在不同的溶剂和温度下,用单点法和多点法测定聚二(甲氧基乙氧基乙氧基)磷腈的相对分子质量,研究最佳的测定条件.通过实验比较得出:以甲醇作为溶剂,在40℃下,稳定7 min测定出的数据较稳定、可靠.单点法与多点法相比较,单点法具有更为简单、快捷等特点,所以单点法完全可以用来测定聚磷腈的相对分子质量.The measurement of molecular weight of poly [ di （methoxy-ethoxyethoxy） phosphazene] （MEEP） by vapor pressure osmometry was investigated. The effect of solvents and temperature on determina- tion of the molecular weight of the polymer was studied. The obtained results showed that the determined data were reliable, when the measurement was conducted after seven minutes at 40 ~（2 for stability. Single-spot method is simpler and quicker than multi-spots method. So single-spot method can be used to determine molecular weights of polyphosphazenes.

关 键 词：聚磷腈 相对分子质量 蒸汽压渗透法 测定条件 

分 类 号：O631.6[理学—高分子化学]