摘要
针对高分子化学本科教学中“活性自由基聚合”知识点抽象,学生难以理解的教学难题,开展了光引发可逆加成断裂链转移(RAFT)自由基聚合3D打印实验。实验首先合成O-(乙基)-S-(2-丙酸乙酯基)黄原酸酯(EXEP),随后使用商用光敏树脂,进行添加/不添加EXEP条件下的3D打印。随后使用得到的打印体开展荧光功能后修饰与焊接对比实验。通过对比实验现象,深入理解活性自由基聚合机理及其对产物后功能化能力的影响,实现“活性自由基聚合”原理的“可视化”和实例化应用展示。本实验将基础理论有机融合到趣味实验中,实验耗时合理,操作简便,效果明显,符合本科教学实验基本要求,有助于提升学生综合分析能力,激发学生深入研究的兴趣,培养其创新意识及拓展延伸的能力。
This experiment addresses the challenge of understanding the abstract concept of“living”in living radical polymerization within the undergraduate teaching of polymer chemistry course.We conducted a 3D printing experiment using photo-induced reversible addition-fragmentation chain transfer(RAFT)polymerization.Initially,we synthesized O-(ethyl)-S-(2-propyl ethanoate thio)xanthate(EXEP)under optimized conditions.Subsequently,3D printing was performed with commercial photosensitive resin under conditions with and without EXEP.The printed structures were then subjected to post-modification with a fluorescent monomer,and a comparative experiment on polymer welding was conducted.By analyzing and comparing the experimental results,we aimed to visually demonstrate the mechanism of living radical polymerization and its impact on post-functionalization.This experiment seamlessly integrates foundational theory into an engaging practical context.It is characterized by its reasonable duration,simplicity in operation,significant outcomes,and alignment with basic requirements for undergraduate teaching experiments.Furthermore,it contributes to enhancing students’comprehensive analytical abilities,sparking their interest in deeper research,and cultivating their innovative awareness and extension capabilities.
作者
李佳佳
张翔俣
袁智涵
钱正阳
朱健
Jiajia Li;Xiangyu Zhang;Zhihan Yuan;Zhengyang Qian;Jian Zhu(College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,Jiangsu Province,China)
出处
《大学化学》
CAS
2024年第5期11-19,共9页
University Chemistry
作者简介
通讯作者:李佳佳,Email:chemjjli@suda.edu.cn;通讯作者:朱健,Email:chemzhujian@suda.edu.cn。
