Multicomponent polymerization of sulfur, chloroform and diamine toward polythiourea  

作　　者：Nan Zheng He Gao Zihui Jiang Wangze Song 

机构地区：[1]Department of Polymer Science and Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China Chemistry》2023年第3期870-877,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21978039);the Natural Science Foundation of Jiangsu Province(BK20221265,BK20211100);the Fundamental Research Funds for the Central Universities(DUT21YG133,DUT22YG224).

摘　　要：The efficient utilization of elemental sulfur(S8) for developing high value-added chemicals is a global concern considering its abundant sources and yearly accelerating environmental issues. However, it has been a long-standing challenge to directly transform elemental sulfur to sulfur-containing polymer, especially via an environmentally benign manner. Herein, a unique chemo-differentiating multicomponent polymerization(MCP) of elemental sulfur, chloroform, and diamine is reported to construct polythiourea based on amine-involved two sequential reactions including isothiocyanation and nucleophilic addition.This strategy features isocynide-free monomers as starting materials, mild conditions, high molecular weights(up to72,900 g/mol) and desired yields(up to 83%). With the advantages of inactive isocyanation and active nucleophilic addition, the stoichiometric balance of amine and isothiocyanate could be delicately controlled to afford various polythioureas with high molecular weights. The polythioureas have been further utilized in the Cu-based aqueous catalysis and Hg-based ion adsorption.

关 键 词：multicomponent polymerization elemental sulfur polythiourea environmental friendliness 

分 类 号：O62[理学—有机化学]