【摘要】 采用毛细管流变仪研究了自制的用中纯度对苯二甲酸(MTA)合成的聚对苯二甲酸乙二醇酯(PET)流变性能。结果表明,用MTA合成的PET熔体属非牛顿假塑性流体,表现为切力变稀且剪切粘度低于常规PET,其非牛顿指数大于常规PET,熔体表观粘度对温度的敏感性也大于常规PET。更多还原

【Abstract】 The Rheological property of self - prepared PET synthesized with medium - purity terephthalic acid was studied with capillary rheometer. The result showed that the PET melt synthesized with MTA was non - Newtonian pseudoplastic fluid,which is characterized by the following aspects: its cutting force is turning thinner,its cutting viscosity is lower than conventional PET, its non - Newtonian index is higher than conventional PET, and temperature sensitivity of the melt apparent viscosity of the melt is also stronger than that of conventional PET.更多还原