时温叠加与Cox-Merz规则在流变测试中的应用  

Application of time-temperature superposition and Cox-Merz rule in rheological test

作　　者：马丽[1] 王文燕[1] 韦德帅[1] Ma Li;Wang Wenyan;Wei Deshuai(PetroChina Daqing Chemical Research Center,Daqing 163714,China)

机构地区：[1]中国石油天然气股份有限公司大庆化工研究中心,黑龙江大庆163714

出　　处：《合成树脂及塑料》2023年第2期44-46,共3页China Synthetic Resin and Plastics

摘　　要：采用旋转流变仪针对低密度聚乙烯进行振荡频率扫描测试,通过Cox-Merz规则和时温叠加原理对测试结果进行数据处理,并对低密度聚乙烯直接进行流动稳态测试,将结果进行对比。结果表明:将振荡频率扫描实验结果利用时温叠加原理和Cox-Merz规则处理后,可以测得更高剪切速率的数据,但是时温叠加实验比较繁琐,需要进行多个温度的动态频率扫描实验。An oscillation frequency sweep test was carried out on low-density polyethylene with rotating rheometer in this experiment.The test results were processed by use of Cox-Merz rule and the principle of time-temperature superposition and compared with the results of the direct flow steady-state test.The results show that the data of a larger shear rate can be obtained from oscillation frequency sweep test,processed by the principle of time-temperature superposition and the Cox-Merz rule.Higher shear rate can be measured by use of the principle of time-temperature superposition and the Cox-Merz rule,however,the experiment is more cumbersome and requires a dynamic frequency sweep experiment at multiple temperatures.

关 键 词：低密度聚乙烯 Cox-Merz规则 时温叠加 剪切速率 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]