Affiliation:
1. College of Materials Science and Engineering Chongqing University 174 Shazhengjie, Shapingba Chongqing 400044 China
Abstract
AbstractFlame retardant treatment of epoxy resins (EP) to reduce their flammability for extending their range of applications attracts considerable attention. However, the synthesis process of conventional flame retardants is complicated and involves organic hazardous solvents. Meanwhile, how to ensure both the flame‐retardant and mechanical properties is a long‐standing and actual difficult problem. In this work, a supramolecular flame retardant (named ATPFR) is facilely created by one‐pot reaction, using cheap and accessible raw materials in an ecologically benign aqueous solvent. ATPFR is applied to improve the fire safety of EP. With only 5 wt% ATPFR addition, EP can reach the limiting oxygen index of 28.5% and the UL‐94 V‐0 rating with a significant “blow‐out effect.” The cone calorimetry test reveals that the EP thermoset with 5 wt% ATPFR has a 75.8% reduction in the peak heat release rate (p‐HRR) and a 67.3% reduction in the peak smoke production rate (p‐SPR), respectively, compared with the pure EP. Additionally, EP composites with the small amount of ATPFR exhibit a slight decrease and maintain good mechanical properties. Therefore, the facile synthesis and application of this supramolecular flame retardant provide a reliable way for the construction of polymer materials with environment‐friendly and effective flame‐retardant system.
Funder
Fundamental Research Funds for the Central Universities
State Key Laboratory of High Performance Civil Engineering Materials
Graduate Scientific Research and Innovation Foundation of Chongqing
Subject
Materials Chemistry,Polymers and Plastics,Organic Chemistry