Kinetics of Non-Isothermal Behaviour of Synthetic Cationites with Low Acidity

An investigation was made of the thermal behaviour under non-isothermal conditions of a series of low-acidity synthetic cationites having a methacrylic-divinylbenzene (DVB) matrix, such as Amberlite IRC 120, Ionenaustauscher IV Merck, Vionit CC1, and Purolite C104, C105 and C106. The macroporous, macroreticular and gel cationites were in acidic or sodium form, with various granulations and degrees of cross-linking. The apparent kinetic parameters (reaction order, n, activation energy, E, and pre-exponential factor A) were evaluated for two dehydration processes and the effects of the experimental conditions on these parameters were investigated. This revised version was published online in July 2006 with corrections to the Cover Date.     

用DSC研究阻燃PET的结晶性和结晶动力学

<正> 聚对苯二甲酸乙二酯(PET)是一种熔点较高的结晶性聚合物,其结晶性和结晶动力学已得到了广泛的研究。我们最近合成的一种含磷聚合物(或齐聚物)聚苯基磷酸二苯砜酯(PSPPP),可作为PET纺丝较为理想的阻燃剂。当PET中添加5wt％的这种阻燃剂时,其极限氧指数可达到30。然而,有关这种阻燃剂的加入对PET结晶特性的影响方面的研究鲜见报道。本文用DSC方法研究了阻燃剂添加量的多少对PET结晶程度的影响,并且对纺制阻燃PET纤维的实用添加量5wt％的试样进行了结晶动力学研究。