HTGPC分析全密度聚乙烯样品中低聚物  

Analysis of Oligomer in all-density Polyethylene by HTGPC

作　　者：代丽斌[1] 宋学军[2] 武士威[2] 

机构地区：[1]中国石化北京燕化研究院分析中心,北京102500 [2]沈阳师范大学化学与生命科学学院,辽宁沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2006年第3期330-333,共4页Journal of Shenyang Normal University:Natural Science Edition

摘　　要：利用高温凝胶渗透色谱法对全密度聚乙烯样品中的低聚物分子量进行了分析,通过实验确定了GPC法分析双峰HDPE的最优化条件:流动相的流速为1.0 mL/min,样品的浓度为2.0 g/L,进样量为100μL.在第二反应器氢气含量很低的条件下,聚合产物中重均分子量小于1万的低聚物含量不增加.为CG工艺模试产品性能达到或优于工业化产品6100M、6380及环管/气相产品的性能这一结论提供了分子量方面的分析依据.The molecular weight of low-molecular polymer was tested by using the High Temperature Gelatin Permeation Chromatography（HTGPC）. The split-blip HDPE optimized condition was gained through GPC determination. The speed of mobile phase is 1.0 mL/Min. The sample density is 2.0 g/L. The sample size is 100 μL. Under the condition of very low hydrcgen content in secondary reactor, the oligomer content in polymer does not increase, when the weight-average molecular weight of this oligomer is smaller than 10 000. This conclusion provide the analysis basis of molecular weight for the production performance of the CG craft mold-trial achieving or surpassing the product performance of industrialization product 6100M, 6380 and loop/vapor phase.

关 键 词：高温凝胶渗透色谱 分析 聚乙烯 低聚物 

分 类 号：TQ317.5[化学工程—高聚物工业]