采用过程再现教学方法讲解聚合物共混物分相机理——针对“高聚物结构与性能”理论教学难点的教学设计

引用本文: 姚东东, 顾军渭, 闫毅, 张军亮, 郑亚萍. 采用过程再现教学方法讲解聚合物共混物分相机理——针对“高聚物结构与性能”理论教学难点的教学设计[J]. 大学化学, 2025, 40(4): 131-137. doi: 10.12461/PKU.DXHX202408125 shu

Citation: Dongdong Yao, JunweiGu, Yi Yan, Junliang Zhang, Yaping Zheng. Teaching Phase Separation Mechanism in Polymer Blends Using Process Representation Teaching Method: A Teaching Design for Challenging Theoretical Concepts in “Polymer Structure and Properties” Course[J]. University Chemistry, 2025, 40(4): 131-137. doi: 10.12461/PKU.DXHX202408125 shu

采用过程再现教学方法讲解聚合物共混物分相机理——针对“高聚物结构与性能”理论教学难点的教学设计

西北工业大学化学与化工学院, 西安 710129
基金项目:
2022年研究生“课程思政”示范课程；2022年西北工业大学基础前沿课程建设项目；2024年度西北工业大学教育教学改革研究项目(24GZ11359)；西北工业大学教育教学改革研究项目(2024JGWZ07, 2023JGZ20)；教育部产学合作协同育人项目；研究生教育研究基金项目(2023YMs018)；研究生教育综合改革发展创新项目(KCJG202408)

摘要: “高聚物结构与性能”课程中的共混物分相是聚合物改性的一种重要方法，不同的分相机理得到不同的相分离结构，进而得到聚合物材料不同的性能。掌握和理解聚合物共混物的分相机理至关重要，共混物的分相机理十分抽象，也是本课程理论教学的难点和重点。针对此问题，根据多年的教学经验，融入科研成果，设计了过程再现教学方案，即将如何得到共混物相图的科研过程再现出来。讲解共混物的分相机理的思路为：从最简单的二元混合物热力学讲起，进而讲解二元吸热、放热体系分别在低温和高温情况下的热力学行为，最后到复杂情况下的二元共混物的热力学行为及如何得到该相图，从相图上对应讲解不同组分和不同温度时聚合物共混物的两种分相机理。通过上述讲解可以使学生理解分相机理，部分同学还能够将分相机理运用于离子液体凝胶的增强改性，取得了很好的改性效果。

关键词:

English

Teaching Phase Separation Mechanism in Polymer Blends Using Process Representation Teaching Method: A Teaching Design for Challenging Theoretical Concepts in “Polymer Structure and Properties” Course

School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710029, China
Received Date: 30 August 2024
Revised Date: 27 January 2025
Available Online: 13 March 2025

Abstract: Phase separation in polymer blends is a crucial method for polymer modification, which is covered in the course “Polymer Structure and Properties”. Different phase separation mechanisms result in distinct phase-separated structures, ultimately leading to various material properties. Understanding these mechanisms is essential yet challenging for students due to their abstract nature, making it a key focus in theoretical teaching. Based on years of teaching experience and research findings, we developed a process reproduction teaching method that demonstrates how phase diagrams of polymer blends are obtained. The teaching approach begins with basic binary mixture thermodynamics, then progresses to explaining thermodynamic behaviors of endothermic and exothermic binary systems at both low and high temperatures. Finally, it addresses complex binary blend thermodynamics and phase diagram construction. Using these phase diagrams, we explain two types of phase separation mechanisms under different compositions and temperatures. This teaching method has effectively helped students understand phase separation mechanisms, with some students successfully applying this knowledge to enhance ionic liquid gels.

Key words:

Structure and properties of polymer
/ Phase separation mechanism of polymer blends
/ Process representation teaching method

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沈阳化工大学材料科学与工程学院沈阳 110142

采用过程再现教学方法讲解聚合物共混物分相机理——针对“高聚物结构与性能”理论教学难点的教学设计

English

Teaching Phase Separation Mechanism in Polymer Blends Using Process Representation Teaching Method: A Teaching Design for Challenging Theoretical Concepts in “Polymer Structure and Properties” Course

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

采用过程再现教学方法讲解聚合物共混物分相机理——针对“高聚物结构与性能”理论教学难点的教学设计

English

Teaching Phase Separation Mechanism in Polymer Blends Using Process Representation Teaching Method: A Teaching Design for Challenging Theoretical Concepts in “Polymer Structure and Properties” Course

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs