Affiliation:
1. College of Materials Science and Engineering Taiyuan University of Technology Taiyuan People's Republic of China
2. Taiyuan Rail Transit Group Co. Ltd Taiyuan People's Republic of China
3. Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology) Ministry of Education Taiyuan People's Republic of China
Abstract
AbstractBiobased epoxy resins are gaining attention as a renewable alternative to petroleum‐based resins. However, their inherent flammability requires flame‐retardant treatment. In this study, hexaphenoxycyclotriphosphazene (HPCP) and various synergists were utilized to improve the flame retardancy of lignin‐based epoxy resin (EP‐L). Results showed that (3‐aminopropyl)triethoxysilane (APTES) had the most effective synergistic effect for HPCP to form a P/N/Si‐containing system, resulting in a compact crosslinked char layer. Upon the incorporation of HPCP and APTES (6∶1, 12 wt% of EP mass) into EP, a V‐0 classification was achieved in the UL‐94 vertical burning assessment, with a limiting oxygen index of 33.6% and a 47.77% decrease in the peak of heat release rate. This system minimally influenced the tensile strength of the composite (a 16.51% reduction), and maximumly increased its initial degradation temperature by 83 °C, compared with EP‐L. © 2023 Society of Industrial Chemistry.
Funder
National Natural Science Foundation of China
Shanxi Provincial Key Research and Development Project
Subject
Polymers and Plastics,Materials Chemistry,Organic Chemistry