马来酸单聚乙二醇单甲醚酯等温结晶行为研究  

Study on Isothermal Crystallization Behavior of MPEGMA

作　　者：牟思阳 郭静[1] 于春芳[1] 张森[1] 于跃[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《塑料科技》2015年第10期21-24,共4页Plastics Science and Technology

基　　金：国家自然科学基金项目(51373027)

摘　　要：采用偏光显微镜（POM）和差示扫描量热仪（DSC）观察了马来酸单聚乙二醇单甲醚酯（MPEGMA）的结晶形态,并对其结晶动力学进行了研究。结果表明：随着等温结晶温度的升高,MPEGMA结晶中的束状结构逐渐消失,球晶生长速率呈非线性下降;随着等温结晶时间的延长,MPEGMA的球晶半径呈线性增加。MPEGMA的等温结晶动力学分析结果显示,其Avrami指数为1.84~2.16,结晶活化能为136.3 k J/mol。Avrami指数的数据表明MPEGMA晶体呈二维生长模式,成核方式为均相成核。The crystal morphology and melt crystallization kinetics of mono polyethylene glycol maleate （MPEGMA） were investigated by means of polarizing microscope （POM） and differential scanning calorimeter （DSC）. The results show that the sheaflike structure in MPEGMA crystals disappears gradually, and the growth rate of MPEGMA spherulites nonlinearly decreases as the isothermal crystallization temperature increases. The radius of MPEGMA spherulites increases linearly with the increase of isothermal crystallization time. The isothermal crystallization kinetics of MPEGMA indicates that the Avrami exponent changes in the range from 1.84 to 2.16 and crystallization activation energy is 136.3 kJ/mol The data of Avrami exponent shows that the crystallization mechanism of MPEGMA belongs to homogeneous nucleation with dimensional growth.

关 键 词：马来酸单聚乙二醇单甲醚酯 等温结晶 结晶动力学 

分 类 号：O633.14[理学—高分子化学]