【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(■)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(△E_η)随■的增大先增大后减小;在所选■范围内, ECDP-1,ECDP-2熔体的△E_η都大于PET; ECDP-1,ECDP-2与PET熔体的结构黏度指数(△η)随着温度的升高而减小; ECDP-1,ECDP-2熔体的△η较PET熔体高,表明ECDP-1,ECDP-2熔体的结构化程度高于PET熔体。更多还原

【Abstract】 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(■); 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(△E_η) of ECDP-1,ECDP-2 and PET melts first increased and then decreased with the increase of ■; the △E_η of ECDP-1 and ECDP-2 melts was higher than that of PET melt in a given range of ■; the structural viscosity index(△η) of ECDP-1,ECDP-2 and PET melts decreased with the increase of temperature; and the △η 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.更多还原