摘要
用示差扫描量热法(DSC)研究了聚氧化乙烯(PEO)及其与高氯酸锂(LiClO4)复合体系的非等温结晶过程。依次用Jeziorny方法、一种结合Avrami和Ozawa方程的方法分析了以上体系中PEO的非等温结晶过程,得到了PEO在不同体系中非等温结晶时的动力学参数。动力学参数表明LiClO4晶粒缩短了PEO的结晶时间,使复合体系中PEO的结晶速率大于PEO体系的,但PEO体系形成更完善晶体;为使二者达到相同的相对结晶度,PEO体系需要更大的冷却速率。结果表明,LiClO4晶粒能够有效地将PEO的结晶相转变成非晶相,即LiClO4可有效地抑制PEO的结晶过程。
The non-isothermal crystallization kinetics of poly（ethylene oxide）（PEO） and its composite with lithium perchlorate（LiCIO4 ） were investigated via differential scanning calorimetry（DSC）. Non-isothermal crystallization process of PEO in the above system was described by Jeziorny method and a new method combined with the Avrami and Ozawa equation. The kinetics parameters of PEO in various system were obtained. The results show that grains of LiClO4 have curtailed crystalline time of PEO, and the overall crystallization rate of PEO in composite is higher than that of PEO system. However, more perfect crystal is formed in PEO system. A conclusion can be deduced that LiClO4 can be effective in producing and stabilizing the amorphous structure of PEO, that is to say, the addition of LiClO4 can availably hinder PEO crystallization.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2006年第2期377-382,共6页
The Chinese Journal of Nonferrous Metals
基金
湖南省教育厅资助项目(03C499)
