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| 热水管材用乙烯-丙烯无规共聚树脂的结构表征 | |
| 引用本文： | 郭梅芳,董宇平,黄红红,张京春,李前树.热水管材用乙烯-丙烯无规共聚树脂的结构表征[J].高分子学报,2006(1):177-179. |
| 作者姓名： | 郭梅芳 董宇平 黄红红 张京春 李前树 |
| 作者单位： | 1. 北京理工大学理学院,北京,100081;中国石油化工股份有限公司北京化工研究院,北京,100013 2. 北京理工大学理学院,北京,100081 3. 中国石油化工股份有限公司北京化工研究院,北京,100013 |
| 摘 要： | 近几年发展起来的热梯度淋洗分级法(TREF)在研究高结晶聚烯烃的聚合反应机理方面表现出优越性.TREF是根据结晶性聚合物的结晶度进行分级的一项分析和制备技术.Desreux首先提出根据结晶度进行分级的思想1],而Shirayama首次采用TREF方法对低密度聚乙烯完成分级2].除聚乙烯外,TR |
| 关 键 词： | 丙烯-乙烯无规共聚物 热水管材 TREF GPC |
| 收稿时间： | 2005-06-13 |
| 修稿时间： | 2005-08-19 |
THE STRUCTURE CHARACTERIZATION OF ETHYLENE-PROPYLENE RANDOM COPOLYMERS FOR HOT WATER PIPING |
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| Guo Meifang,Dong Yuping,Huang Honghong,Zhang Jingchun,Li Qianshu.THE STRUCTURE CHARACTERIZATION OF ETHYLENE-PROPYLENE RANDOM COPOLYMERS FOR HOT WATER PIPING[J].Acta Polymerica Sinica,2006(1):177-179. | |
| Authors: | Guo Meifang Dong Yuping Huang Honghong Zhang Jingchun Li Qianshu |
| Institution: | 1 School of Science,Belling Institute of Technology, Beijing 100081;2 Beijing Research Institute of Chemical Industry, SINOPEC, Belting 100013 |
| Abstract: | Two commercial ethylene-propylene random copolymers(A and B) for hot water piping of which A has better long term heat stability and slow crack growth resistance performance than B were fractionated with respect to the isotactity distribution by preparative temperature-rising elution fractionation(TREF).The molecular weight and distribution of fractions and the original resins were investigated by gel permeation chromatography.The results indicated that both A and B had broad isotacticity distribution and A had fewer portions of high isotacticity than B.At the same time A had broader and more typical double-peak molecular weight distribution.The fractions of A had higher molecular weight and broader molecular weight distribution than those of B's.All of these results implied the differences between the catalysts or the polymerization processes for the two copolymers. |
| Keywords: | Random ethylene-propylene copolymer Hot water piping Preparative temperature-rising elution fractionation(TREF) GPC Fractionation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |