高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (10): 1644.

• 论文 • 上一篇    下一篇

无定形梳状高分子固体电解质的二重玻璃化转变及典型VTF特征

丁黎明1, 石晶2, 马德柱3, 董绍俊1   

  1. 1. 中国科学院长春应用化学研究所, 长春, 130022;
    2. 东北师范大学分析测试中心;
    3. 中国科学技术大学材料科学与工程系
  • 收稿日期:1995-10-05 出版日期:1996-10-24 发布日期:1996-10-24
  • 通讯作者: 丁黎明.男,30岁,博士后.
  • 作者简介:丁黎明.男,30岁,博士后.

Studies on the Two Class Glass Transition and the Typical VTF Behaviour of an Amorphous Comb Polymer Electrolyte

DING Li-Ming1, SHI Jing2, MA De-Zhu3, DONG Shao-Jun1   

  1. 1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022;
    2. Analysis Center, Northeast Normal University;
    3. Department of Materials Science & Engineering, University of Science & Technology of China
  • Received:1995-10-05 Online:1996-10-24 Published:1996-10-24

PDF (PC)

被引次数

3

摘要： 研究了交替马来酸酐共聚物多缩乙二醇酯(CP350)-LiNO3络合物的热行为及离子导电性。实验表明:CP350/LiNO3络合物在所研究的[Li]/[EO]配比范围呈均相无定形并具有二重玻璃化转变。2个玻璃化转变温度均随盐含量的增加而上升。离子电导率随盐浓度的变化出现1个极大值,室温电导率最大可达3.72×10-5S/cm.导电行为呈典型VTF特征。

关键词: 高分子固体电解质, 复阻抗谱, 二重玻璃化转变, VTF特征

Abstract: A comb polymer(CP350) with oligo-oxyethylene side chains of the type-(CH2 CH2O)7CH3 was prepared from methyl vinyl ether/maleic anhydride copolymer and poly(ethylene glycol) methyl ether.The polymer can dissolve LiNO3 salt to form homogeneous amorphous polymer electrolyte.This electrolyte system was first found to have two class glass transitions,and the two Tgs were observed to increase with increasing salt content.The ionic conduction was measured by using the complex impedance method,and conductivities were investigated as functions of temperature and salt concentration.At 25℃,the ionic conductivity maximum of this system can get to 3.72×10-5S/cm at the [Li]/[EO] ratio of 0.057.The appearance of the conductivity maximum has been interpreted as being due to the effect of Tg and the so called physical crosslinks.The temperature dependence of the ionic conductivity displaying non-Arrhenius behaviour can be analyzed using the Vogel-Tammann-Fulcher equation and interpreted on the basis of the configurational entropy model.

Key words: Solid polymer electrolytes, Complex impedance spectrum, Two class glass transition, VTF behaviour

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