Concurrent thiol–ene competitive reactions provide reprocessable, degradable and creep-resistant dynamic–permanent hybrid covalent networks. Issue 22 (29th October 2020)

• Record Type: Journal Article
• Authors: Li, Qiong; Ma, Songqi; Lu, Na; Qiu, Jianfan; Ye, Jiale; Liu, Yanlin; Wang, Sheng; Han, Yingying; Wang, Binbo; Xu, Xiwei; Feng, Hongzhi; Zhu, Jin
• Is Part Of: Green chemistry. Volume 22:Issue 22(2020)
• Page Start: 7769
• Page End: 7777
• Publication Date: 2020-10-29
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d0gc02823a
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : A reprocessable, degradable and creep-resistant hybrid network was synthesized through a catalyst-free, solvent-free thiol–ene reaction from two simple components in one pot. Abstract : A catalyst-free, solvent-free thiol–ene addition reaction was developed to produce a dynamic–permanent hybrid cross-linked polymer from two simple components, a tetrathiol and a divinyl ether, in one pot. The tetrathiol and divinyl ether underwent two competitive Markovnikov and anti-Markovnikov addition reactions simultaneously and separately generated S, O-thioacetal cross-links and thioether cross-links. The dynamic feature of S, O-thioacetal cross-links imparts excellent malleability, reprocessability and degradability to the obtained network, and the permanent covalent thioether cross-links provide favorable high-temperature creep resistance. This work will broaden the thiol–ene chemistry and provide a green method to achieve recyclable cross-linked polymers and covalent adaptable networks (CANs) or vitrimer-like materials with high-temperature creep resistance.