Catalyst-Free Thiol鈥揧ne Click Polymerization: A Powerful and Facile Tool for Preparation of Functional Poly(vinylene sulfide)s

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• 作者：Bicheng Yao ; Ju Mei ; Jie Li ; Jian Wang ; Haiqiang Wu ; Jing Zhi Sun ; Anjun Qin ; Ben Zhong Tang
• 刊名：Macromolecules
• 出版年：2014
• 出版时间：February 25, 2014
• 年：2014
• 卷：47
• 期：4
• 页码：1325-1333
• 全文大小：431K
• 年卷期：v.47,no.4(February 25, 2014)
• ISSN：1520-5835

文摘

The 鈥渢hio-click鈥?polymerization is a well-expanded concept of click polymerization. Among the click polymerizations, the thiol鈥搚ne click polymerization is less developed and still in its infancy stage. In general, UV light, elevated temperature, amine, or transition metal complexes is needed to catalyze the thiol鈥搚ne click polymerization, which greatly complicates the experimental operation and limits its application. In this work, a facile and powerful thiol鈥搚ne click polymerization was developed, which could be carried out under very mild conditions without using external catalyst. Simply mixing the aromatic diynes (1a鈥?b>1e) and dithiols (2鈥?b>4) with equivalent molar ratio in THF at 30 掳C will readily produce soluble and regioregular functional poly(vinylene sulfide)s (PIa鈥揚Ie, PII, and PIII) with high molecular weights (M_w up to 85鈥?00) in excellent yields (up to 97%) after as short as 2 h. Furthermore, no double addition product of an ethynyl group was found. This catalyst-free thiol鈥搚ne click polymerization has remarkably simplified the reaction conditions and will facilitate the preparation of functional materials applied in diverse areas.