Rigid polyurethane foam composites based on iron tailing: Thermal stability, flame retardancy and fire toxicity

IF 1.3 4区医学 Q4 MATERIALS SCIENCE, BIOMATERIALS

Cellular Polymers Pub Date : 2022-05-26 DOI:10.1177/02624893221105317

Yadong Yang, Hai-jian Shen, Yuzhou Luo, Renhui Zhang, Junjie Sun, Xiuyu Liu, Zhifang Zong, Gang Tang

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引用次数: 3

Abstract

In order to explore the potential utilization value of iron tailings, the typical solid waste-iron tailings was introduced into rigid polyurethane foam (RPUF) as a flame retardant filler in this paper. The flame retardant performance, combustion performance, gas-phase products and char residue’s related properties of RPUF/ITS composites were systematically investigated by limiting oxygen index, thermogravimetric (TG), cone calorimetry (CCT) and thermogravimetric-infrared spectrometry (TG-FTIR). The results showed that ITS improved the overall thermal stability of the composites, and the T-5%, T-50%, Tmax1, Tmax2 and char residue rates were all higher than those of the pure samples. The CCT indicated that ITS had a certain effect on smoke suppression and heat release reduction. The peak heat release rate of RPUF-6 was reduced by 22.75% compared with that of the pure sample, and the total smoke release of RPUF-2 was reduced by 25.36%. Smoke factor (SF), fire growth rate index and fire performance index indicated that ITS reduced the fire risk of RPUF/ITS composites. TG-FTIR showed that ITS inhibited the decomposition of RPUF/ITS composites, and the release intensity of hydrocarbons, CO2, isocyanate compound, CO, aromatic compounds and esters decreased significantly. TG, MCC, scanning electron microscope and Raman implied that ITS promoted the formation of a dense char layer in RPUF and improved the heat resistance of the char layer.

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基于铁尾矿的硬质聚氨酯泡沫复合材料:热稳定性、阻燃性和火毒性

为探索铁尾矿的潜在利用价值，将典型固体废铁尾矿作为阻燃填料引入硬质聚氨酯泡沫塑料(RPUF)。采用极限氧指数、热重法(TG)、锥量热法(CCT)和热重红外光谱法(TG- ftir)对RPUF/ITS复合材料的阻燃性能、燃烧性能、气相产物及炭渣相关性能进行了系统研究。结果表明，ITS提高了复合材料的整体热稳定性，其T-5%、T-50%、Tmax1、Tmax2和炭渣率均高于纯样品。CCT结果表明ITS具有一定的抑烟降热效果。与纯样品相比，RPUF-6的峰值放热率降低了22.75%，RPUF-2的总放烟率降低了25.36%。烟雾因子(SF)、火灾增长率指数和防火性能指数表明ITS降低了RPUF/ITS复合材料的火灾风险。TG-FTIR结果表明，ITS抑制了RPUF/ITS复合材料的分解，其碳氢化合物、CO2、异氰酸酯类化合物、CO、芳香族化合物和酯类化合物的释放强度显著降低。TG、MCC、扫描电镜和拉曼分析表明ITS促进了RPUF中致密炭层的形成，提高了炭层的耐热性。

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

Cellular Polymers 工程技术-材料科学：生物材料

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Cellular Polymers is concerned primarily with the science of foamed materials, the technology and state of the art for processing and fabricating, the engineering techniques and principles of the machines used to produce them economically, and their applications in varied and wide ranging uses where they are making an increasingly valuable contribution. Potential problems for the industry are also covered, including fire performance of materials, CFC-replacement technology, recycling and environmental legislation. Reviews of technical and commercial advances in the manufacturing and application technologies are also included. Cellular Polymers covers these and other related topics and also pays particular attention to the ways in which the science and technology of cellular polymers is being developed throughout the world.