Phosphonate‐influenced Diels‐Alder chemistry toward multi‐path recyclable, fire safe thermoset and its carbon fiber composites
Song Gu,
Shao‐Dong Xu,
Jia‐Hui Lu,
Xiao‐Lu Pu,
Qing‐Ruo Ren,
Yan‐Fang Xiao,
Yu‐Zhong Wang,
Li Chen
Affiliations
Song Gu
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Shao‐Dong Xu
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Jia‐Hui Lu
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Xiao‐Lu Pu
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Qing‐Ruo Ren
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Yan‐Fang Xiao
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Yu‐Zhong Wang
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Li Chen
The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry Sichuan University Chengdu China
Abstract Dynamic covalent chemistry offers a solution to tackle the recycling issue of epoxy resins (EPs) and their carbon fiber‐reinforced composites; however, the vulnerability to creep associated with the inflammable nature of the EPs are the key obstacles for their applications. Herein, we propose a feasible and facile strategy to overcome these obstacles by incorporating phosphorus‐influenced Diels‐Alder (DA) chemistry to construct dynamic epoxy networks. In the strategy, the electron‐withdrawing phosphonate in the dienophile maleimide greatly promotes the thermal stability of the DA reaction, exhibiting excellent creep resistance, repairability, and malleability; while its flame‐retardant activity improves the fire safety of the resultant thermosets. Meanwhile, nondestructive recycling of carbon fiber is achieved. The ease with which EP and its composites can be manufactured, used, recycled and re‐used–without losing service performance–points to new orientation in sustainable composites.
