Ceiling Temperature and Floor Temperature of Chain Polymerization

JI Ming-jun; GAO Mei-chao; ZHANG Yu-xia; JING Zhi-hong; BAI Xiao; LIU Peng; FENG Yuan-yuan; GUO Li-hua

doi:10.14028/j.cnki.1003-3726.2024.24.277

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Ceiling Temperature and Floor Temperature of Chain Polymerization

更新时间：2025-04-29

- Ceiling Temperature and Floor Temperature of Chain Polymerization
- Polymer Bulletin Vol. 38, Issue 5, Pages: 825-829(2025)
- 作者机构：
  
  曲阜师范大学化学与化工学院，曲阜 273165
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.24.277
  CLC：
- Received：19 September 2024，
  
  Accepted：2024-11-21，
  
  Published Online：11 December 2024，
  
  Published：20 May 2025
- 稿件说明：
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纪明君, 高美超, 张雨霞, 景志红, 白啸, 刘鹏, 冯媛媛, 郭丽华. 链式聚合的上限温度与下限温度. 高分子通报,2025, 38(5), 825–829.

Ji, M. J.; Gao, M. C.; Zhang, Y. X.; Jing, Z. H.; Bai, X.; Liu, P.; Feng, Y. Y.; Guo, L. H. Ceiling temperature and floor temperature of chain polymerization. Polym. Bull. (in Chinese), 2025, 38(5), 825–829.
纪明君, 高美超, 张雨霞, 景志红, 白啸, 刘鹏, 冯媛媛, 郭丽华. 链式聚合的上限温度与下限温度. 高分子通报,2025, 38(5), 825–829. DOI： 10.14028/j.cnki.1003-3726.2024.24.277.

Ji, M. J.; Gao, M. C.; Zhang, Y. X.; Jing, Z. H.; Bai, X.; Liu, P.; Feng, Y. Y.; Guo, L. H. Ceiling temperature and floor temperature of chain polymerization. Polym. Bull. (in Chinese), 2025, 38(5), 825–829. DOI： 10.14028/j.cnki.1003-3726.2024.24.277.

摘要

大多数聚合反应的热力学性质通常表现为焓变Δ

0，熵变Δ

0，由此具有“聚合上限温度”。这一点也几乎成为高分子教材中热力学部分讨论的基础。但是，某些聚合过程表现出熵变大于零(Δ

0)的热力学性质，从而可能存在“聚合下限温度”。遗憾的是，现有教科书中对这类热力学情况的介绍较为缺乏。本文从Δ

，Δ

和Δ

的关系出发，以热力学的角度分析聚合反应的自发性，着重于补充“聚合下限温度”这一概念，并对受聚合下限温度调节的高分子合成进行举例和对比。这有助于学生更准确和深入地认识聚合反应热力学与临界温度的相关内容。

Abstract

Most polymerization reactions

with enthalpy changes Δ

0 and entropy changes Δ

have a “ceiling temperature (

)”. Thermodynamics sections in polymer textbooks are generally based on this scenario. However

some polymerization processes exhibit Δ

leading to a “floor temperature (

)”. This aspect is often missing in textbooks. This paper explores the spontaneity of polymerization reactions from a thermodynamic perspective

focusing on the relationship between Δ

and Δ

. It aims to introduce the concept of “floor temperature”

providing examples and comparisons of polymer materials that regulated by

. This will help students gain a more accurate and in-depth understanding of the thermodynamics of polymerization reactions and critical temperatures.

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references

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