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首页> 外文期刊>Journal of Applied Polymer Science >Study on degradation reactions in polyethylene terephthalate containing 5-sulpho isophthalyl moieties
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Study on degradation reactions in polyethylene terephthalate containing 5-sulpho isophthalyl moieties

机译：含5-磺基间苯二甲酰基聚对苯二甲酸乙二醇酯的降解反应研究

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摘要

Kinetics of thermal degradation occurring on polyester containing cationic dyeable comonomer units viz. 5-sulphoisophthalate moieties are studied by measurement of changes in intrinsic viscosity and carboxyl values on the polymer after subjecting the polymer chips to temperatures in the range 275-285°C for different residence times ranging from 5 to 60 min and comparing with the homopolymer. The activation energy values for degradation are estimated from the kinetic data. Mechanical properties of the textured yarns produced from the partially oriented yarns (POY) spun under different residence times are measured. Yarn produced with higher residence time has poor mechanical properties. The SEM images of the POY show presence of particles at the surface of the yarn due to polymer degradation. The size of the particles as seen on the surface increase with increase of retention time. Addition of thermal stabilizer helps in controlling the thermal degradation.
机译：在含有阳离子可染共聚单体单元的聚酯上发生热降解的动力学，即。通过将聚合物碎片置于275-285°C的温度下5-60分钟的不同停留时间并与均聚物进行比较后，通过测量聚合物的特性粘度和羧基值的变化来研究5-磺基间苯二甲酸酯部分。从动力学数据估计降解的活化能值。测量了由在不同停留时间下纺出的部分取向纱线（POY）生产的变形纱线的机械性能。停留时间较长的纱线具有较差的机械性能。 POY的SEM图像显示由于聚合物降解，纱线表面存在颗粒。在表面上看到的颗粒尺寸随着保留时间的增加而增加。添加热稳定剂有助于控制热降解。

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