超高分子量聚乙烯/高密度聚乙烯共混体系动态流变行为及相容性研究  

Studies on Dynamic Rheological Properties and Miscibility of UHMWPE/HDPE (Ultra-High Molecular Weight Polyethylene/High Density Polyethylene) Blends

作　　者：巩明方 孙勇飞 王新威 Gong Mingfang;Sun Yongfei;Wang Xinwei(Shanghai Research Institute of Chemical Industry Company Limited,State Key Laboratory of Polyolefins and Catalysis,Shanghai Key Laboratory of Catalysis Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]上海化工研究院有限公司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200062

出　　处：《化学世界》2021年第9期538-544,共7页Chemical World

基　　金：上海市国资委企业技术创新和能级提升(No.2018002);上海市优秀技术带头人计划(No.17XD1421400)资助项目。

摘　　要：利用旋转流变仪研究了超高分子量聚乙烯/高密度聚乙烯(UHMWPE/HDPE)共混体系在180、190、200、210℃下的动态流变行为,并利用对数加和公式、van Gurp-Palmen (vGP)曲线和Cole-Cole曲线分析了共混物的相容性。结果表明,随着HDPE质量分数升高,共混熔体的缠结密度变小,非牛顿性减弱,复数黏度、复数模量降低,损耗因子升高;Carreau-Yasuda本构方程可较好地描述复数黏度的变化规律;动态流变分析表明UHMWPE/HDPE共混物具有较好的相容性,扫描电镜(SEM)图也证实了这一结论。The dynamic rheology behaviors of ultra-high molecular weight polyethylene/high density polyethylene(UHMWPE/HDPE) blends at 180, 190, 200 and 210 ℃ were measured by rotational rheometer. The miscibility was also analyzed by log-additivity rule, van Gurp-Palmen(vGP) curves and Cole-Cole plots. The results showed that the entanglement density, complex viscosity, complex modulus of blends decreased with the increasing of HDPE content;the complex viscosity data can be described well by Carreau-Yasuda constitutive equations;rheological and morphological investigations indicated that UHMWPE/HDPE blends was compatible.

关 键 词：超高分子量聚乙烯/高密度聚乙烯共混物 动态流变行为 形貌 相容性 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]