CAJ | 학술논문

测量了聚对苯二甲酸乙二醇酯（ PET）纤维在不同温度下经不同时间热老化后的特性粘数、端羧基含量和断裂强度。 PET纤维的特性粘数降和端羧基含量增长基本符合一级反应的规律。建立了PET纤维断裂强度变化的动力学方程，断裂强度随时间的变化为三级反应，断裂强度变化的表观活化能为135．7 kJ· mol -1。
측량료취대분이갑산을이순지（ PET）섬유재불동온도하경불동시간열노화후적특성점수、단최기함량화단렬강도。 PET섬유적특성점수강화단최기함량증장기본부합일급반응적규률。건립료PET섬유단렬강도변화적동역학방정，단렬강도수시간적변화위삼급반응，단렬강도변화적표관활화능위135．7 kJ· mol -1。
The intrinsic viscosity、content of carboxyl end group and fracture strength of Polyethylene tereph-thalate ( PET) fibers were measured after thermal ageing .The results showed that the intrinsic viscosity degradation and the growth of carboxyl end group content of PET during the thermal aging is first order reaction .Fitting is made to the loss of strength and found that the strength loss of PET fiber is third-order reaction and the apparent activation energy is 135.7 kJ· mol-1 .