Fire retardant polyethylene terephthalate containing 4,4′-(hexafluoroisopropylidene)diphenol-substituted cyclotriphosphazene microspheres

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2022-12-16 DOI:10.1177/09540083221145881

Hai-yan Sun, Yuanzhao Zhu, Hong Chao Xu, Yi Zhong, Linping Zhang, Yimeng Ma, X. Sui, Bijia Wang, Xueling Feng, Zhiping Mao

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Abstract

Polyphosphazene derivatives are gaining popularity due to their eco-friendly character and high content of flame-retardant components. Herein, a polyphosphazene derivative (PZAF) microsphere was successfully synthesized utilizing an in-situ template approach, which was then employed as an additive flame retardant in polyethylene terephthalate (PET) to improve the fire safety. Thermogravimetric analysis revealed that PZAF promoted the pyrolysis of PET in advance to generate a stable char layer that protects the matrix from heat, consequently increasing char residues. With addition of 10 wt% PZAF, the PET nanocomposites obtained a V-0 grade in vertical combustion test and its LOI value increased from 24.2 vol% to 32.1 vol%. Moreover, the peak heat release and carbon monoxide production decreased by 46.6% and 50.6%, respectively. This was because the phosphonic acid fragments and pyridine ring compounds produced by the PZAF pyrolysis encouraged the development of a robust char layer. Meanwhile, the •PO radicals generated by the pyrolysis of PZAF could capture free radicals in the gas phase, ultimately ending the chain reaction of combustion. Also, mechanical properties of the PET nanocomposites were noticeably enhanced by the addition of 3 or 5 wt% PZAF.

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含有4,4′-(六氟异丙烯)二酚取代环三磷腈微球的阻燃型聚对苯二甲酸乙二醇酯

聚磷腈衍生物由于其环保特性和高含量的阻燃成分而越来越受欢迎。本文采用原位模板法成功合成了聚磷腈衍生物（PZAF）微球，并将其用作聚对苯二甲酸乙二醇酯（PET）中的添加剂阻燃剂，以提高其防火安全性。热重分析表明，PZAF提前促进了PET的热解，产生了稳定的焦层，保护基体免受热量的影响，从而增加了焦残留。在添加10wt%PZAF的情况下，PET纳米复合材料在垂直燃烧试验中获得V-0级，其LOI值从24.2vol%增加到32.1vol%。此外，峰值热释放和一氧化碳产量分别下降了46.6%和50.6%。这是因为PZAF热解产生的膦酸片段和吡啶环化合物促进了坚固的焦层的形成。同时，PZAF热解产生的•PO自由基可以捕获气相中的自由基，最终结束燃烧的链式反应。此外，通过添加3或5wt%的PZAF，PET纳米复合材料的机械性能显著增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.

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