A fire‐safe, single‐component epoxy resin based on a phosphorus/imidazole‐containing latent curing agent and diphenylphosphine

Author:

Hu Ben1,Wang Jun12ORCID,Chen Xi2,Wang Jingsheng1,Yang Shuang2ORCID,Zhu Lu3,Zou Lanian4,Huo Siqi5

Affiliation:

1. School of Materials Science and Engineering, Wuhan University of Technology Wuhan China

2. School of Mechanical and Electronic Engineering Wuhan University of Technology Wuhan China

3. Wuhan East Lake of HiTech Group Co., Ltd. Wuhan China

4. High Performance Composite Technology Institute Wuhan University of Technology Taizhou China

5. Center for Future Materials University of Southern Queensland Springfield Australia

Abstract

AbstractThis work reported a flame‐retardant, single‐component epoxy resin (EP) via introducing diphenylphosphine (DPP) and benzimidazolyl‐substituted cyclotriphosphazene (BICP) into EP. The differential scanning calorimetry (DSC) test showed that the onset curing temperature of DPP/BICP‐15/10 was 50°C lower than that of BICP‐12 due to the catalytic decomposition effect of DPP toward BICP under heating. Besides, the shelf life of DPP/BICP‐15/10 at room temperature reached ~14 days, demonstrating good storage stability. EP/DPP/BICP maintained satisfactory thermal properties and showed excellent flame retardancy with a UL‐94V‐0 classification. Compared with the unmodified EP sample, the peak heat release rate (PHRR) and total heat release (THR) of DPP/BICP‐15/13 were decreased by ~68.1% and ~55.1%, respectively. Hence, this flame‐retardant, single‐component epoxy resin with satisfactory comprehensive properties exhibited great potential for versatile industrial applications.

Funder

Australian Research Council

Publisher

Wiley

Subject

Polymers and Plastics

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