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Poly(thioether) Vitrimers via Transalkylation of Trialkylsulfonium Salts
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-08-15 00:00:00 , DOI: 10.1021/acsmacrolett.7b00494
Benjamin Hendriks 1 , Jelle Waelkens 1 , Johan M Winne 1 , Filip E Du Prez 1
Affiliation  

Vitrimers are permanently cross-linked organic polymers that can be reshaped, molded, and recycled without loss of network integrity. Herein, we report poly(thioether) networks, prepared through a straightforward thiol–ene photopolymerization, that can be turned into catalyst-free vitrimer materials by partial alkylation of the thioethers (1–10%) to the corresponding trialkylsulfonium salts. Based on a classical SN2-type substitution, the resulting polyionic networks can be reshaped upon heating via swift transalkylation reactions. This novel exchange reaction for the design of vitrimers was studied both on low MW model compounds as well as on a material level. In addition, we demonstrated the recycling of these networks without significant loss of mechanical properties.

中文翻译:

通过三烷基锍盐的烷基转移制备聚(硫醚) Vitrimers

Vitrimers 是永久交联的有机聚合物,可以在不损失网络完整性的情况下进行重塑、模制和回收利用。在这里,我们报告了通过简单的硫醇-烯光聚合制备的聚(硫醚)网络,通过将硫醚(1-10%)部分烷基化为相应的三烷基锍盐,可以将其转化为无催化剂的 vitrimer 材料。基于经典的 S N 2 型取代,所得聚离子网络可以通过快速烷基转移反应在加热时重塑。这种用于设计玻璃体的新型交换反应在低分子量模型化合物和材料水平上都进行了研究。此外,我们展示了这些网络的回收利用,而不会显着损失机械性能。
更新日期:2017-08-15
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