Synthesis and characterization of a novel P/N containing flame retardant and its effect on flame-retardancy, thermal and mechanical properties of epoxy/clay nanocomposites

IF 1.8 4区化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2023-04-07 DOI:10.1177/09540083231169166

V. Soni, Jai Bhagwan Dahiya

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引用次数: 2

Abstract

A P/N containing flame retardant DOPO-QN was synthesized by a reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 8-hydroxyquinoline (QN). Its chemical structure was characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) like 1H, 13C, 31P NMR, and high-resolution mass spectrometry (HRMS) techniques. The synthesized DOPO-QN was employed as an additive type flame retardant in combination with clay nanomer 1.34TCN (NC) in diglycidyl ether of bisphenol A/4,4ʹ-diaminodiphenlsulfone (DGEBA/DDS) to synthesize epoxy thermosets. The fire behavior of synthesized epoxy thermosets was studied by UL-94, limiting oxygen index (LOI), and cone calorimeter tests. The EP/DOPO-QN (1.5%P)/NC sample passed the UL-94 test with a V-0 rating and LOI value of 26.5%. A decrease in peak heat released, carbon monoxide, and carbon dioxide emissions was observed in the cone calorimeter test. Thermogravimetric analysis (TGA) of epoxy thermosets showed an increase in thermal stability at a higher temperature range on the formation of nanocomposites. Also, a remarkable improvement in storage modulus was observed for the EP/DOPO-QN (1.5%P)/NC sample containing 2.0% NC in dynamic mechanical analysis (DMA).

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新型含P/N阻燃剂的合成、表征及其对环氧/粘土纳米复合材料的阻燃性能、热性能和力学性能的影响

通过9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）与8-羟基喹啉（QN）的反应，合成了一种含P/N的阻燃剂DOPO-QN。通过傅立叶变换红外光谱（FTIR）、核磁共振（NMR）（如1H、13C、31P NMR）和高分辨率质谱（HRMS）技术对其化学结构进行了表征。将合成的DOPO-QN作为添加剂型阻燃剂，与粘土纳米单体1.34TCN（NC）在双酚A/4,4-二氨基二苯砜二缩水甘油醚（DGEBA/DDS）中结合，合成环氧热固性树脂。通过UL-94、极限氧指数（LOI）和锥形量热计测试，研究了合成的环氧热固性树脂的阻燃性能。EP/DOP-QN（1.5%P）/NC样品通过了UL-94测试，V-0评级和LOI值为26.5%。在锥形量热计测试中观察到峰值释放热量、一氧化碳和二氧化碳排放量减少。环氧热固性树脂的热重分析（TGA）表明，在更高的温度范围内，纳米复合材料的热稳定性增加。此外，在动态力学分析（DMA）中，对于含有2.0%NC的EP/DOPO-QN（1.5%P）/NC样品，观察到储能模量的显著提高。

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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.