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：2026-07-27

- Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate
- Chinese Journal of Polymer Science Vol. 44, Issue 8, Pages: 2670-2680(2026)
- 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：
- DOI：10.1007/s10118-026-3654-1
  CLC：
- Received：05 January 2026，
  
  Revised：2026-02-13，
  
  Accepted：10 March 2026，
  
  Online First：02 July 2026，
  
  Published：15 August 2026
- 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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