摘要
通过聚乙二醇单甲醚(MPEG)与马来酸酐反应制备具有双端基活性的聚乙二醇单甲醚单马来酸酯(MPEGMA)。利用POM研究了MPEG和MPEGMA的结晶形态,结果表明MPEG和MPEGMA都存在十字消光现象,但两者结晶形态存在差别。用DSC技术研究了非等温结晶动力学,用Jeziorny法和Mo法描述了MPEG和MPEGMA非等温结晶动力学,研究表明随降温速率的增大,两种材料的结晶速率均增大;MPEG的端羟基与马来酸酐发生酯化反应完成端基转化后,MPEG原有的分子运动受到抑制,导致端基转化产物MPEGMA的结晶速率降低,MPEGMA与MPEG结晶成核方式和生长机理产生差异。
Mono polyethylene glycol maleate( MPEGMA) was synthesized by esterification of malefic anhydride and Methoxy polyethylene glycols( MPEG). The crystal morphology of Methoxy Poly Ethylene Glycol and Mono Polyethylene Glycol maleate were studied using POM,the results shows that there is cross extinction phenommenon both in MPEG and MPEGMA,but there is a difference in the crystalline form. The non-isothermal crystallization kinetics of MPEG and MPEGMA was investigated by DSC,and described by Jeziorny and Mo,the studies shows that with the increase of cooling rate,the crystallization rate of the two materials are increased. After transforming end-group by esterification between MPEG and MA,the original molecular motion of MPEG was inhibited,which lead to the crrystallization rate of therminal group conversion products-MPEGMA decreased,making differences in nucleation model and growth mechanism of crystallization for MPEGMA and MPEG.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第15期15075-15079,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51373027)
辽宁省教育厅一般项目资助项目(LR2012017)
关键词
聚乙二醇单甲醚
聚乙二醇单甲醚单马来酸酯
非等温结晶
结晶动力学
methoxy polyethylene glycol
mono polyethylene glycol maleate
non-isothermal crystallization
crystallization kinetics
