大学化学 >> 2025, Vol. 40 >> Issue (4): 33-45.doi: 10.12461/PKU.DXHX202403069

所属专题: 高分子教育教学

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深入剖析高分子物理中自由体积的科学内涵、测试方法及其应用

肖承义, 孙晓丽, 张晨, 李韦伟   

  1. 北京化工大学材料科学与工程学院, 有机无机复合材料国家重点实验室, 北京 100029
  • 收稿日期:2024-03-23 录用日期:2024-05-20 发布日期:2025-04-25
  • 通讯作者: 李韦伟 E-mail:liweiwei@iccas.ac.cn
  • 基金资助:
    北京市高等教学学会2023年面上项目

An In-Depth Analysis of the Scientific Connotations, Testing Methods, and Applications of Free Volume in Polymer Physics

Chengyi Xiao, Xiaoli Sun, Chen Zhang, Weiwei Li   

  1. State Key Laboratory of Organic-Inorganic Composites, College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2024-03-23 Accepted:2024-05-20 Published:2025-04-25
  • Contact: Weiwei Li E-mail:liweiwei@iccas.ac.cn

摘要: 自由体积概念起源于液体黏度研究,后由Fox和Flory应用于高分子材料玻璃化转变,成为解析高分子物理现象的关键工具。当前教学中对自由体积探讨不足,本文概述了自由体积的起源、定义和应用,探讨了测试方法,并深入研究了自由体积与高分子物理性能的联系。本研究旨在深化学生对自由体积概念的理解,促进对高分子物理过程的全面把握,激发学习兴趣和科研热情。

关键词: 高分子物理, 自由体积, 玻璃化温度, 黏度, 机械性能

Abstract: The concept of free volume originated from the study of liquid viscosity and was later utilized by Fox and Flory in the analysis of the glass transition in polymer materials, establishing itself as a crucial tool for understanding various physical phenomena in polymers. However, there is currently a lack of comprehensive discussion on free volume in educational contexts. This paper provides an overview of the origin, definition, and applications of free volume, explores different testing methods, and investigates the relationship between free volume and the physical properties of polymers. The study aims to deepen students’ understanding of the free volume concept, promote a comprehensive grasp of polymer physical processes, and inspire interest and enthusiasm for scientific research.

Key words: Polymer physics, Free volume, Glass transition temperature, Viscosity, Mechanical properties