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超高分子量聚乙烯分子量及分子量分布的测定
1.上海市多相结构材料化学工程重点实验室,华东理工大学产品工程系,上海 200237; 2.浙江大学化学工程与生物工程学院,浙江 杭州 310027; 3.聚烯烃催化技术与高性能材料国家重点实验室,上海市聚烯烃催化技术重点实验室, 上海化工研究院有限公司,上海 200062
Determination of Molecular Weight and Molecular Weight Distribution for Ultrahigh Molecular Weight Polyethylene
1. Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, Department of Product Engineering, East China University of Science and Technology, Shanghai 200237, China; 2. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; 3. State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai Research Institute of Chemical Industry, Shanghai 200062, China
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摘要 超高分子量聚乙烯UHMWPE的分子量和分子量分布直接影响其加工性能和机械性能,然而传统的凝胶色谱法(GPC)存在一定的局限性,粘均分子量难以全面反映UHMWPE的结构特点。为了开发出一种精度高、重复性好的UHMWPE分子量和分子量分布测试方法,本研究在常规高温GPC设备的基础上,基于溶液流动分级机理,选取了合适凝胶孔径的凝胶色谱柱,改善了普通GPC测试结果分子量分布偏宽的问题。并通过对UHMWPE/三氯苯溶解方法的深入研究,解决了普通GPC测试结果重复性差的问题。对UHMWPE新产品的研发和后期的加工有着重要的实际意义。
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叶纯麟1
辛 忠1
梁 鹏2
赵世成1
肖明威3
郭 宁3
杨天慧3
关键词 超高分子量聚乙烯分子量分子量分布凝胶色谱    
Abstract:Molecular weight and molecular weight distribution of ultrahigh molecular weight polyethylene (UHMWPE) directly affect the processing properties and mechanical properties of UHMWPE. However, traditional gel chromatography (GPC) has certain limitations, and the viscosity average molecular weight is difficult to fully reflect the structural characteristics of UHMWPE. In order to develop a method with high precision and good repeatability for measuring molecular weight and molecular weight distribution of UHMWPE, a gel column with suitable gel pore size was selected to overcome the problem of wider molecular weight distribution using common GPC with the solution flow classification mechanism in mind, based on the existing GPC equipment. Through the systematically study of the UHMWPE/trichlorobenzene dissolution method, the problem of poor repeatability of ordinary GPC results was also solved. Improvements mentioned above have important practical significance for the development and later processing of new UHMWPE products.
Key wordsultrahigh molecular weight polyethylene    molecular weight    molecular weight distribution    gel chromatography   
收稿日期: 2019-08-30     
作者简介: 叶纯麟(1989—),男,工程师;辛 忠(1962—),男,教授,通讯联系人。E-mail:xzh@ecust.edu.cn。
引用本文:   
叶纯麟1,辛 忠1,梁 鹏2等. 超高分子量聚乙烯分子量及分子量分布的测定[J]. 化学反应工程与工艺, 2019, 35(6): 529-533.
YE Chunlin1,XIN Zhong1,LIANG Peng 2 et al. Determination of Molecular Weight and Molecular Weight Distribution for Ultrahigh Molecular Weight Polyethylene[J]. 化学反应工程与工艺, 2019, 35(6): 529-533.
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