PBT 的 DSC 表观结晶动力学研究

Macrokinetics Approach to Crystallization Applied to PBT

提出了一种新的表观动学方法用于表征ＰＢＴ的结晶过程，在这个方法中采用方程ｄＣ／ｄｔ＝Ｋｆ（ｃ）＝ｅ＾［－Ｅ／ＲＴ＋ａ（ｂ－Ｔ）］＊ｆ（ｃ）表征高分子材料的结晶过程，由不同降温速率ＰＢＴ的ＤＳＣ曲线求得ＰＢＴ的结晶动力学方程为：ｄＣ／ｄｔ＝ｅ＾［－２５９３７９／Ｔ＋１．３４０３（ｂ－Ｔ）］＊ｆ（ｃ）。由该方程及降温ＤＳＣ曲线可以求得各种温度下结晶动力学曲线。

A new macrokinetic approach is applied to PBT crystallization. In this method, an equation d C /d t = kf (c) =e^ [-E/RT+a(b-T)] f c was used to describe the development of crystallinity of polymeric material. From the DSC curve (ranging from -1℃/min to-40℃/min), the equation for PBT was gotten as d C /d t =e^ [-259379/T+1.34043(b-T)] f (c) . From a cooling curve and this equation, kinetic equations for various temperatures can de calculated.