常压阳离子可染聚酯熔体的流变性能研究  

Rheological properties of normal pressure easy cationic dyeable polyester melt

作　　者：张天亮 甘丽华 李志鹏[1] 李志勇 金剑 李鑫 ZHANG Tianliang;GAN Lihua;LI Zhipeng;LI Zhiyong;JIN Jian;LI Xin(School of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029;State Key Laboratory of Biobased Fiber Manufacturing Technology,China Textile Academy Co.,Ltd.,Beijing 100025)

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国纺织科学研究院有限公司生物源纤维制造技术国家重点实验室,北京100025

出　　处：《合成纤维工业》2021年第1期6-10,共5页China Synthetic Fiber Industry

基　　金：国家重点研发计划项目(2016YFB0302801)。

摘　　要：应用高压毛细管流变仪测试了2种常压阳离子染料可染聚酯(ECDP-1,ECDP-2)熔体的流变性能并与常规聚酯(PET)熔体的流变性能进行对比。结果表明:ECDP-1,ECDP-2与PET熔体都属于假塑性非牛顿流体,黏度随剪切速率(γ)的增大而减小;ECDP-1,ECDP-2与PET熔体的非牛顿指数都随温度的升高而增大,ECDP-1,ECDP-2熔体的非牛顿性大于PET;ECDP-1,ECDP-2与PET熔体的黏流活化能(ΔE_(η))随γ的增大先增大后减小;在所选γ范围内,ECDP-1,ECDP-2熔体的ΔE_(η)都大于PET;ECDP-1,ECDP-2与PET熔体的结构黏度指数(Δη)随着温度的升高而减小;ECDP-1,ECDP-2熔体的Δη较PET熔体高,表明ECDP-1,ECDP-2熔体的结构化程度高于PET熔体。The rheological properties of two kinds of normal pressure easy cationic dyeable polyester(ECDP-1 and ECDP-2)melts were measueed by high-pressure capillary rheometer and was compared with those of conventional polyester(PET)melt.The results showed that ECDP-1,ECDP-2 and PET melts were all pseudoplastic non-Newtonian fluids,and their viscosity decreased with the increase of the shear rate(γ);the non-Newtonian index of ECDP-1,ECDP-2 and PET melts increased with the elevation of temperature.and ECDP-1 and ECDP-2 melt exhibited the non-Newtonian behavior more obvious than PET melt;the viscous flow activation energy(ΔE_(η))of ECDP-1,ECDP-2 and PET melts first increased and then decreased with the increase of γ;the ΔE_(η) of ECDP-1 and ECDP-2 melts was higher than that of PET melt in a given range of γ;the structural viscosity index(Δη)of ECDP-1,ECDP-2 and PET melts decreased with the increase of temperature;and the Δη of ECDP-1 and ECDP-2 melts was higher than that of PET melts,which indicated that ECDP-1 and ECDP-2 melts were more structured than PET melt.

关 键 词：聚对苯二甲酸乙二醇酯 常压阳离子染料可染聚酯 熔体 流变性能 假塑性流体 非牛顿指数 黏流活化能 结构黏度指数 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]