Reform of Polymer Experiment Course Guided by Scientific Research: Taking Thiol-Isocyanate Click Reaction in Dispersion Polymerization to Prepare Cross-linked and Functional Microspheres as Example
LI Chun-Mei**, YIN De-Zhong, GENG Wang-Chang, YIN Chang-Jie
School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China
Abstract Dispersion polymerization is an important method for preparing monodisperse microspheres, which has been a compulsory experiment for students majoring in polymer. Traditional dispersion polymerization which is based on free radical chain-growth polymerization is difficult to prepare microspheres with high-crosslinking degree and functionalization, and requires a long polymerization time to increase the relatively low monomer conversion. This paper introduces the stepwise polymerized thiol-isocyanate click reaction with high reactivity to synthesize monodisperse, crosslinked, and functional microspheres via dispersion polymerization. In this experiment, monodisperse and crosslinked microspheres could be easily prepared under slightly stirring at room temperature. Moreover, functional microspheres were obtained via adjusting the ratio of thiol and isocyanate monomers. Compared with traditional dispersion polymerization using styrene or acrylate as monomers, thiol-isocyanate reaction in dispersion polymerization as an experiment course has advantages in theory system, skills training, efficiency and expansibility of knowledge.
LI Chun-Mei, YIN De-Zhong, GENG Wang-Chang, YIN Chang-Jie. Reform of Polymer Experiment Course Guided by Scientific Research: Taking Thiol-Isocyanate Click Reaction in Dispersion Polymerization to Prepare Cross-linked and Functional Microspheres as Example[J]. Chinese Journal of Chemical Education, 2021, 42(12): 63-69.
