A P/N synergistic flame retardant containing flexible nitrile group for enhancing the mechanical properties and fire safety of epoxy resins

Junwei Li; Qiuju Ma; Quanyi Liu; Penglun Zheng

doi:10.1002/app.54842

journal article Oct 31, 2023

A P/N synergistic flame retardant containing flexible nitrile group for enhancing the mechanical properties and fire safety of epoxy resins

Junwei Li

Qiuju Ma Quanyi Liu

Penglun Zheng

Journal of Applied Polymer Science Vol. 141 No. 4 · Wiley

View at Publisher Save 10.1002/app.54842

Abstract

AbstractTo further enhance the fire safety of epoxy resins, a phosphorus–nitrogen synergistic flame retardant (DPVHD) with a flexible chain segment and a nitrile group was synthesized. In addition to the traditional flame retardant elements P and N, the flame retardancy of the epoxy composites is further enhanced by the cross‐linking effect of the nitrile groups introduced to form an interpenetrating network with the epoxy matrix. The results showed that the sample with 10 wt% DPVHD‐10/EP had a LOI of 32.3% and passed the UL‐94 V‐0 rating, with PHRR and THR reduced by 15.4% and 47%, respectively, compared to pure EP. It is worth noting that the introduction of flexible chain segments improves the flexural properties of the epoxy resin matrix. Compared with pure epoxy, the flexural properties of epoxy‐cured compounds with DPVHD addition show a rising trend with the increase of flame‐retardant additive. And the rise of DPVHD‐10/EP reaches 33.6%, which greatly reduces the negative effect of flame‐retardant additives on the mechanical properties of the epoxy resin matrix. This work therefore provides new ideas for exploiting the advantages of phosphorus‐nitrogen synergy and nitrile‐based cross‐linking for flame retardancy in epoxy resins.

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Metrics

21

Citations

48

References

Details

Published: Oct 31, 2023
Vol/Issue: 141(4)
License: View

Authors

J

Junwei Li

College of Civil Aviation Safety Engineering Civil Aviation Flight University of China Guanghan China; Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province Guanghan China

Q

Qiuju Ma

School of Emergency Management and Safety Engineering China University of Mining and Technology (Beijing) Beijing China

Q

Quanyi Liu

College of Civil Aviation Safety Engineering Civil Aviation Flight University of China Guanghan China; Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province Guanghan China

P

Penglun Zheng

College of Civil Aviation Safety Engineering Civil Aviation Flight University of China Guanghan China; Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province Guanghan China

Funding

National Natural Science Foundation of China Award: U2033206

Fundamental Research Funds for the Central Universities Award: 2023ZKPYAQ07

Natural Science Foundation of Sichuan Province Award: 2022NSFSC0302

Cite This Article

Junwei Li, Qiuju Ma, Quanyi Liu, et al. (2023). A P/N synergistic flame retardant containing flexible nitrile group for enhancing the mechanical properties and fire safety of epoxy resins. Journal of Applied Polymer Science, 141(4). https://doi.org/10.1002/app.54842

A P/N synergistic flame retardant containing flexible nitrile group for enhancing the mechanical properties and fire safety of epoxy resins

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