Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate

Jing Gao; Liang Chen; Liang-Yuan Qi; Su-Hong Li; Yuan Hu; Xin Wang; Lian-Min Ji; Ying-Jian Wang; Wei-Yi Xing

doi:10.1007/s10118-026-3654-1

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Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate

RESEARCH ARTICLE | Updated：2026-07-02

- Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate
- Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate
- Chinese Journal of Polymer Science 2026年44卷第8期页码：2670-2680
- Affiliations：
  
  a.State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
  b.School of Intelligent Engineering and Automation, Beijing University of Posts and Telecommunications, Beijing 102206, China
  c.Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Qinghai 810008, China
- Author bio：
  
  wangyingjian@bupt.edu.cn (Y.J.W.)
  xingwy@ustc.edu.cn (W.Y.X.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 52473064 and 52321003), Cross-team for Youth Innovation in Basic Research of Qinghai Institute of Salt Lakes, Chinese Academy of Sciences (No. islJCTD-2022-3), Key Research & Development (R&D) Plan of Anhui Province (No. 202304a05020027), and Anhui Provincial Natural Science Foundation (No. 2308085ME147). We would like to thank Dr. Yi Jin and Dr. An-Feng Shi at the Experimental Center of Engineering and Material Sciences, USTC, for their assistance with the thermophysical property analysis. This work was partially conducted at the Instruments Center for Physical Science, University of Science and Technology of China.;The authors declare no interest conflict.Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-026-3654-1.The data that support the findings of this study are available from the corresponding author upon reasonable request.
- DOI：10.1007/s10118-026-3654-1
  中图分类号：
- 收稿：2026-01-05，
  
  修回：2026-02-13，
  
  录用：2026-03-10，
  
  网络首发：2026-07-02，
  
  纸质出版：2026-08-15
- Accepted：
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Gao, J.; Chen, L.; Qi, L. Y.; Li, S. H.; Hu, Y.; Wang, X.; Ji, L. M.; Wang, Y. J.; Xing, W. Y. Transparent UV-cured phosphorus/nitrogen hybrid coating for simultaneously enhancing flame retardancy and surface hardness of polycarbonate. Chinese J. Polym. Sci. 2026, 44, 2670–2680

Jing Gao, Liang Chen, Liang-Yuan Qi, et al. Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate[J]. Chinese Journal of Polymer Science, 2026, 44(8): 2670-2680.
Gao, J.; Chen, L.; Qi, L. Y.; Li, S. H.; Hu, Y.; Wang, X.; Ji, L. M.; Wang, Y. J.; Xing, W. Y. Transparent UV-cured phosphorus/nitrogen hybrid coating for simultaneously enhancing flame retardancy and surface hardness of polycarbonate. Chinese J. Polym. Sci. 2026, 44, 2670–2680 DOI： 10.1007/s10118-026-3654-1.

Jing Gao, Liang Chen, Liang-Yuan Qi, et al. Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate[J]. Chinese Journal of Polymer Science, 2026, 44(8): 2670-2680. DOI： 10.1007/s10118-026-3654-1.

摘要

Using UV curing technology

transparent flame-retardant coatings with an average transmittance exceeding 90% were formed on the surface of polycarbonate films. MAAR-P

enables 0.5 mm thick polycarbonate film to achieve a UL-94 vertical burning rating of V-0.

Abstract

The flame-retardant monomer PG (P) was synthesized from diethylphosphinic acid and glycidyl methacrylate (GMA). Simultaneously

the phosphorus-containing flame-retardant monomer

TAEP (T)

was synthesized from phosphorus oxychloride and 2-hydroxyethyl acrylate. A 50 µm thick transparent UV-cured coating

designated MAAR-P

was successfully constructed on 0.5 mm thick polycarbonate (PC) films by blending PG and TAEP with melamine acrylate resin (MAAR). The fabricated coating demonstrated a high transmittance of 91.9% in the visible-light spectrum. The incorporation of monofunctional PG effectively regulated the system viscosity and mitigated curing shrinkage stress. Furthermore

the synergistic action of phosphorus in different valence states and nitrogen from MAAR imparted a dual gas-phase-condensed phase flame-retardant mechanism to the coating

enabling the PC substrate to attain a V-0 rating in the UL-94 vertical burning test. This research indicates that the MAAR-P

coating engineered

via

molecular design and component optimization concurrently overcomes the limitations

of PC

namely its low surface hardness and inherent flammability. A straightforward and efficient preparation strategy provides a practical approach for transparent flame-retardant coatings for electronic and electrical applications.

关键词

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references

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