Citation: Bangkun Jin, Weidong He. 润物无声，启迪创新——从“冷冻聚合制备高分子量聚合物”综合实验谈起[J]. University Chemistry, ;2021, 36(12): 210200. doi: 10.3866/PKU.DXHX202102009 shu

润物无声，启迪创新——从“冷冻聚合制备高分子量聚合物”综合实验谈起

Bangkun Jin ¹ ,
Weidong He ^2,,

1.
National Demonstration Center for Experimental Chemistry Education (University of Science and Technology of China), Hefei 230026, China;
2.
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China

Corresponding author: Weidong He, wdhe@ustc.edu.cn
Received Date: 5 February 2021

冷冻聚合是一种新发展的聚合反应实施方法，其聚合温度低于反应介质的凝固点，聚合场所为冻结聚合体系中的液相微区，液相微区的体积百分数约为10%。因为聚合温度低、液相微区的单体浓度很高，所以冷冻聚合是制备高/超高分子量聚合物的有效方法。本实验分别实施丙烯酰胺和丙烯酸的冷冻聚合，通过改变冷冻聚合条件调控聚合物的分子量，使用稀溶液黏度法测定所得聚合物的分子量。通过该实验，帮助学生理解自由基聚合分子量控制的基本原理，学会灵活运用Mayo方程，引导学生关注实验细节、掌握实验技巧、学会实验设计。
- Comprehensive experiment,
- Cryo-polymerization,
- Molecular weight control,
- Ultra-high molecular weight,
- Polyacrylamide,
- Poly(acrylic acid)
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