改性PET结晶动力学研究

摘要

采用差示扫描量热法探讨了改性PET的结晶速率与结晶温度的依赖关系，并用Avrami方程进行了量化分析。研究结果表明：在实验温度范围内，3种改性PET树脂随着温度的升高，其结晶程度逐步增加；随着温度的升高，3种改性PET的K值不断增大，t1／2值不断减小；较多的改性单体含量降低了PET的结晶速率。%The relationship between the crystallization speed and the crystallization temperature of the modified PET resin was obtained, and further calculated by Avrami equation. Among the three tested samples, the crystallization degree increased with the increasing temperature. Furthermore, with the increasing temperature, the K value increased while the t1/2 value decreased. The more modified monomer used, the more crystallization speed decreased.