不同分子量PEO及共混体系结晶行为的研究  

Research on Crystallization Behavior of Different Molecular Weight PEO and Blend System

作　　者：张孝彦[1] 王艳凤[1] Zhang Xiaoyan Wang Yanfeng(Yellow River Conservancy Technical Institute, Kaifeng 475004, Henan, Chin)

机构地区：[1]黄河水利职业技术学院,河南开封475004

出　　处：《黄河水利职业技术学院学报》2017年第2期48-51,共4页Journal of Yellow River Conservancy Technical Institute

摘　　要：用偏光显微镜观察PEO_(10W)、PEO_(2W)及其共混物的等温结晶过程和在不同温度下的晶体形貌发现,在同一温度下,分子量大的聚合物结晶速率较快,分子量小的较慢;对于共混物来说,晶体的生长速率和成核速率皆处于PEO_(10W)和PEO_(2W)之间;高温条件下,有利于生长出更加完整、致密的晶体。Polarizing microscope was used to observe the process of PEO10 W,PEO2 W and its blend isothermal crystallization process and crystal morphology of different temperatures. The result shows that under the same temperature, high molecular weight poly （ethylene glycol） had the fastest crystallization rates, and low molecular weight poly （ethylene glycol） had the lowest rates. For the blends, both crystal growth rates and nucleated rates are between their two pure components. Higher temperature is good for the growth of better crystal.

关 键 词：PEO 共混物 聚合物晶体 结晶速率 晶体形貌 

分 类 号：O633.13[理学—高分子化学]