高温凝胶渗透色谱(GPC)测试聚乙烯分子量的条件研究  

Study on the Conditions for Testing the Molecular Weight of Polyethylene by High Temperature Gel Permeation Chromatography

作　　者：熊小莉[1,2] 陈成[2] 罗学刚[2] 

机构地区：[1]四川师范大学化学与材料科学学院,四川成都610066 [2]西南科技大学生物质材料中心,四川绵阳621000

出　　处：《西南科技大学学报》2015年第1期35-40,共6页Journal of Southwest University of Science and Technology

基　　金：十一五国家科技支撑计划(2007BAE42B04);四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放基金(10zxfk23);四川师范大学重点项目(11KYL06);四川省教育厅重点项目(14ZA0027)

摘　　要：研究了Polymer Laboratories(PL)GPC 200型高温凝胶渗透色谱测试聚乙烯分子量的精密性和重复性,并对线性低密度聚乙烯(LLDPE)、聚乙烯蜡(PEW)PEW1、PEW2的分子量进行了测试。结果表明,一份样品连续进样8次,其重均分子量Mw、数均分子量Mn和峰面积的相对标准偏差(RSD)分别为1.3%,0.5%和0.3%,说明仪器精密度良好;对3份样品进行测定,其Mw,Mn和峰面积的RSD分别为0.4%,5.9%,0.6%,说明仪器的重复性良好;测得LLDPE的Mw为117 443,分散系数为4.0,PEW1的Mw为4 892,分散系数为10.5,PEW2的Mw为3 536,分散系数2.0。The precision and repeatability of testing the molecular weight of polyethylene by the Laborato- ries (PL200) high temperature gel permeation chromatography (GPC) was studied and the molecular weight of the linear low - density polyethylene ( LLDPE), polyethylene wax ( both PEW1 and PEW2 ) were analyzed. The results show that the relative standard deviations (RSD) of the Mw, Mn, and peak ar- ea are respectively 1.3%, 0.5% and 0.3% after successivelyloading sample for 8 times, indicating the precision of the instrument is good. Measuring 3 samples, the RSDs of their Mw, Mn and peak area are re- spectively 0.4%, 5.9% and 0.6%, indicating the repeatability of the instrument is good. The measured Mw of LLDPE, PEW1 , PEW2 are respectively 117 443, 4 892 and 3 536, and the dispersion coefficients are respectively 4, 10.5 and 2.0.

关 键 词：高温凝胶渗透色谱 聚乙烯 分子量 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]