管材专用耐热聚乙烯的动态流变行为  

Dynamic rheological behavior of PERT for pipe materials

作　　者：王群涛[1] 高凌雁[1] 郭锐[1] 王日辉[1] 王雪梅[1] 许平[1] 石晶[1] Wang Quntao;Gao Lingyan;Guo Rui;Wang Rihui;Wang Xuemei;Xu Ping;Shi Jing(Research Institute of Qilu Branch Co., SINOPEC, Zibo 255400, China)

机构地区：[1]中国石油化工股份有限公司齐鲁分公司研究院,山东省淄博市255400

出　　处：《合成树脂及塑料》2017年第4期74-76,共3页China Synthetic Resin and Plastics

摘　　要：研究了两种管材专用耐热聚乙烯(PERT,分别记作PE-1和PE-2)的动态流变行为与相对分子质量及其分布。结果表明:动态流变可用于分析管材专用PERT的部分结构,表征相对分子质量及其分布的规律与凝胶渗透色谱法一致;PE-1的相对分子质量分布较窄,储能模量和损耗模量均高于PE-2;PE-2的相对分子质量分布较宽,角频率较低时的损耗系数较小,加工性能好;根据动态流变数据建立的Cole-Cole曲线显示,两种管材专用PERT的结构均为线型且不含有长支链。The dynamic rheological behavior as well as molecular weight and molecular weight distributionof two polyethylene of raised temperature(PERT)pipe materials,PE-1and PE-2,were observed.The resultsindicate that dynamic rheology can be used for the structural analysis on PERT,the results of molecularweight and molecular weight distribution obtained with the technique are equal to those with gel permeationchromatography.The molecular weight distribution of PE-1is narrow,while its storage modulus and lossmodulus are higher than those of PE-2.PE-2has wide molecular weight distribution,its loss coefficient is smallwhen the angular frequency is low,which performs well in processing.The Cole-Cole curves based on dynamicrheological data show that both PE-1and PE-2are linear without long chains.

关 键 词：聚乙烯 耐热 动态流变 管材 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]