Concurrent thiol-ene competitive reactions provide reprocessable, degradable and creep-resistant dynamic-permanent hybrid covalent networks

被引：45

作者：

Li, Qiong ^{[1
,2
]}

Ma, Songqi ^{[1
]}

Lu, Na ^{[1
,2
]}

Qiu, Jianfan ^{[1
,2
]}

Ye, Jiale ^{[1
]}

Liu, Yanlin ^{[1
]}

Wang, Sheng ^{[1
,2
]}

Han, Yingying ^{[3
]}

Wang, Binbo ^{[1
]}

Xu, Xiwei ^{[1
]}

Feng, Hongzhi ^{[1
,2
]}

Zhu, Jin ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Biobased Polymer Mat Technol & Applicat Z, Lab Polymers & Composites, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Publ Technol Serv Ctr, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

来源：

GREEN CHEMISTRY | 2020年 / 22卷 / 22期

基金：

中国国家自然科学基金;

关键词：

CROSS-LINK DENSITY; HIGH-PERFORMANCE; VITRIMERS; RECOVERY; BONDS; ACID;

D O I：

10.1039/d0gc02823a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：7769 / 7777

页数：9

共 43 条

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