首页|Flame-retardant polyurethane and glass fiber-reinforced polymer composites enabled by aromatic heterocyclic liquid mixture flame retardants

Flame-retardant polyurethane and glass fiber-reinforced polymer composites enabled by aromatic heterocyclic liquid mixture flame retardants

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  • NETL
  • NSTL
  • Elsevier
With the rapid development of the pultrusion molding process, glass fiber-reinforced polyurethane composites have become increasingly prominent in industrial applications due to their unique advantages. However, their high flammability significantly limits their potential uses. Here, hexaphenoxycyclotriphosphazene and hexakis (methoxymethyl)melamine resin were combined to create a novel liquid mixture flame retardant (LMFR) for polyurethane and its glass fiber-reinforced polymer composites. The resultant polyurethane exhibited excellent flame retardancy, achieving a V-0 rating in the UL-94 vertical burning test, and a 64.5 % reduction in the peak heat release rate. Similarly, its composite achieved a limiting oxygen index of 58.0 %, a UL-94 V-0 rating, and a 31.9 % reduction in total heat release. Notably, this flame retardant significantly reduced both the smoke production rate and total smoke production in polyurethane and its composite. Meanwhile, LMFR exhibited excellent heat resistance with minimal impact on the thermal stability of polyurethane resin. Mechanistic studies revealed that the LMFR achieved flame retardancy and smoke suppression through a synergistic interaction between the gas and condensed phases, providing an effective approach to improving the safety and performance of glass fiber-reinforced polyurethane composites.

Liquid flame retardantSmoke suppressionGlass fiber-reinforced polyurethane compositesThermal stability

Qiang Lv、Fu-Rong Zeng、Lei He、Shuai-qi Guo、Yuan-wei Yan、Hai-Bo Zhao、Yu-Zhong Wang

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The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University No 24, South Section 1, Yihuan Road, Chengdu, Sichuan 610064, China||China Coal Technology and Engineering Group Chongqing Research Institute Co., LTD, Chongqing Copolyforce New Materials Co., Ltd, Chongqing 400037, China

The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University No 24, South Section 1, Yihuan Road, Chengdu, Sichuan 610064, China

Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou 412007, China

2025

10.1016/j.polymdegradstab.2025.111371

Polymer degradation and stability

Polymer degradation and stability

SCI
ISSN：0141-3910
年,卷(期)：2025.239(Sep.)
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