高聚物分子量两种测定方法对比初探  

Preliminary Comparison of Two Molecular Weight Determination Methods for Polymer

作　　者：付阳[1] 霍萃萌[2] 姜垒[1] 朱琰[1] 任志勇[1] 

机构地区：[1]河南省科学院高新技术研究中心,郑州450002 [2]河南省科学院化学研究所有限公司,郑州450002

出　　处：《河南科学》2009年第12期1520-1523,共4页Henan Science

摘　　要：分别采用高效凝胶渗透色谱(HLGPC)法和多角度激光光散射-凝胶渗透色谱法(MALLS/GPC)法测定了分子量为10万以上氯化聚丙烯(CPP)的分子量及其分布,并据此对两种测定高聚物分子量的方法进行了初步对比分析.结果表明,两种测定方法得到的高聚物分子量相差小于1%,分布相差约2%.与传统的GPC法相比,MALLS法可获得重均分子量的绝对值,因而与GPC联用可获得更加符合样品实际分子量分布的结果.Gel Permeation Chromatography （GPC）and Multi-angle Laser Light Scattered combined with GPC （GPC/ MALLS） were used to determine the molecular weight and its distribution of chlorinated polypropylene （CPP） with molecular weight of over 100,000. The two kinds of molecular weight determination methods for polymer were then priliminarily compared based on the results. It is shown that the difference of the molecular weight obtahed by the two methods is less than 1% while that of molecular weight distribution is about 2 %. Compared with the traditional GPC method, the MALLS method can be used to obtain the absolute weight-average molecular weight, therefore the molecular weight distribution ontained by combination with GPC method can also be more consistent with true case in the polymer.

关 键 词：高聚物分子量 凝胶渗透色谱法 激光光散色法 

分 类 号：TQ657.7[化学工程—精细化工]