Mechanism of Phosphorus-Silicone Synergistic Flame Retardant in Polyester: Enhancing Flame Retardant Performance Through Synergistic Flame Retardant Processes in Gas Phase and Condensed Phase

IF 2.8 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2025-07-18 DOI:10.1002/app.57620

JiaWei Ren, Chao Zeng, Sheng Ming Zhang, Peng Ji, ChaoSheng Wang, HuaPing Wang

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Abstract

The preparation of flame retardant and anti-dripping polyethylene terephthalate (PET) through phosphorus-silicone elements synergies is a common modification method. For different phosphorus flame retardant agents, there are also different synergistic mechanisms with silicone. In this work, the silicone flame retardant agent was added to diethyl phosphite modified flame retardant polyester (PET-ZDP), polyphosphate modified flame retardant polyester (PET-PPE), and (2-carboxyethyl)phenylphosphinic acid modified flame retardant copolymer polyester (FRPET). The results show that PET-PPE and FRPET are mainly gas phase flame retardant, and PET-ZDP has condensed phase flame retardant on the basis of gas phase flame retardant. There is a synergistic effect formed from silicone and PET-ZDP during the condensed phase flame retardant effect with dense and more graphitized residual carbon formed. The LOI of PET-ZDP has been increased from 30.6% to 32.6% and has a UL 94 rating of V-0. Through the study of the phosphorus-silicon flame retardant mechanism, new insights into the synergistic effect of silicone flame retardant agent with different phosphorus flame retardant agents have been put forward, which provides theoretical support for the development of industrial flame retardant and anti-dripping PET.

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磷-硅在聚酯中的协同阻燃机理：通过气相和凝聚相协同阻燃工艺提高阻燃性能

通过磷-硅元素协同作用制备阻燃防滴聚对苯二甲酸乙二醇酯（PET）是一种常用的改性方法。对于不同的磷系阻燃剂，与硅胶的协同作用机理也不同。将有机硅阻燃剂添加到亚磷酸二乙酯改性阻燃聚酯（PET-ZDP）、聚磷酸盐改性阻燃聚酯（PET-PPE）和（2-羧基乙基）苯基膦酸改性阻燃共聚物聚酯（FRPET）中。结果表明：PET-PPE和FRPET以气相阻燃为主，PET-ZDP在气相阻燃的基础上有凝聚相阻燃；在凝聚相阻燃过程中，有机硅与PET-ZDP形成了协同作用，形成了致密且石墨化程度更高的残碳。PET-ZDP的LOI由30.6%提高到32.6%，UL 94等级为V-0。通过对磷硅阻燃机理的研究，提出了硅酮阻燃剂与不同磷阻燃剂协同作用的新见解，为工业阻燃和防滴PET的开发提供了理论支持。

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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.