摘要
发现PVP介电松弛中含有α松弛,β松弛和γ松弛三种极化过程,并拟合得到三个过程的频率谱。在此基础上,利用阿伦尼乌斯方程计算出了β松弛和γ松弛的活化能,并通过VTF方程拟合计算的方法,得到了在升温速率无限小情况下聚乙烯基吡咯烷酮的玻璃化转变温度。
There are three kinds of polarization processes in the dielectric relaxation of PVP-α relaxationβ re- laxation and γ relaxation have been found. And three respective frequency spectrums have been fitted. On this ba- sis, the activation energy ofβ relaxation and y relaxation by using Arrhenius equation is calculated, and fit PVP polymer＇ s glass transition temperature in the case of infinitely small heating rate by using the VTF equation.
出处
《科学技术与工程》
北大核心
2013年第28期8396-8398,共3页
Science Technology and Engineering
基金
中央高校基本科研业务费专项基金项目(12NZYTD20)
(82000793)资助
关键词
PVP
介电
活化能
玻璃化转变
分子运动
PVP dielectric activation energyglass transition molecular motion
