Controlled Synthesis of a Homopolymer Network Using a Well-Defined Single-Component Diels–Alder Cyclopentadiene Monomer
Controlled Synthesis of a Homopolymer Network Using a Well-Defined Single-Component Diels–Alder Cyclopentadiene Monomer
复制标题
使用明确的单组分 Diels-Alder 环戊二烯单体控制合成均聚物网络
DOI：
10.1021/jacs.2c11416
复制
发表时间：
2023
影响因子：
15
通讯作者：
de Alaniz, Javier Read
中科院分区：
文献类型：
--
作者：
Tran, Thi M.;de Alaniz, Javier Read
环戊二烯以其高反应活性和二聚倾向而闻名，这使得单体合成和聚合极具挑战性。事实上，尽管其历史悠久且化学性质引人注目，但自 1926 年 Staudinger 首次尝试均聚环戊二烯以来，文献中只出现了两篇报道。在此，我们提出了一种策略，不仅可以合成、分离和均聚明确的四环戊二烯单体，还可以使网络均聚物去交联。还研究了机械性能，包括蠕变恢复、形状记忆和拉伸行为。有趣的是，与之前的 Cp 基均聚物网络相比，拉伸测试反映了一种坚韧且有弹性的材料。这项工作提供了一个多功能平台来访问和研究新的基于环戊二烯和更明确的均聚物网络，其潜在应用范围从形状记忆聚合物到可降解热固性材料。
Cyclopentadiene is known for its high reactivity and propensity to dimerize, making monomer synthesis and polymerization notoriously challenging. In fact, despite its long history and compelling chemistry, only two reports have appeared in the literature since the first attempt to homopolymerize cyclopentadiene by Staudinger in 1926. Herein, we present a strategy not only to synthesize, isolate, and homopolymerize a well-defined tetracyclopentadiene monomer but also to de-cross-link the network homopolymer. Mechanical properties are also investigated, including creep–recovery, shape memory, and tensile behaviors. Interestingly, the tensile test reflects a tough and elastic material, in contrast to prior Cp-based homopolymer networks. This work provides a versatile platform to access and study new cyclopentadiene-based and better-defined homopolymer networks with potential applications ranging from shape memory polymers to degradable thermosets.