节点文献
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
【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.
【Abstract】 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 determination 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 ℃ for stability.Single-spot method is simpler and quicker than multi-spots method.So singlespot 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;
【Key words】 polyphosphazenes; molecular weight; vapor pressure osmometry; measurement method;
【Key words】 polyphosphazenes; molecular weight; vapor pressure osmometry; measurement method;
【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)
- 【文献出处】 云南大学学报(自然科学版) ,Journal of Yunnan University(Natural Sciences Edition) , 编辑部邮箱 ,2008年03期
- 【分类号】O631.12
- 【被引频次】2
- 【下载频次】166