Preparation and properties of high-temperature resistant bisphthalonitrile resins containing trifluoromethyl groups reinforced by poly (aryl ether nitrile) capped by phthalonitrile and composites

IF 1.8 4区化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2024-01-31 DOI:10.1177/09540083241229209

Xuhai Xiong, Lei Yao, Rong Ren, Donghui Liu, Na Li

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Abstract

A new series of high-temperature resistant bisphthalonitrile resins containing trifluoromethyl groups were prepared based on 4,4’-(hexafluoroisopropylidene) bisphthalonitrile (BFPh), which was toughened by hexafluoroisopropylidene-containing poly (aryl ether nitrile) oligomer capped by phthalonitrile (FPEN-Ph) in the different content. In addition, glass fiber reinforced composites were prepared by hot pressing process. The structure of the oligomer was characterized by FTIR and 1HNMR. The curing behavior of the blends was studied by DSC. Thermal stability and mechanical properties were also studied. The results showed that the introduction of appropriate content of FPEN-Ph could improve the reactivity of the curing reaction. TGA and DMA results showed that the cured polymers and composites had excellent thermal properties. The residual mass of FPEN-Ph content of 10% at 800°C was 72.4%, and the 5% thermal degradation temperature (T5%) under inert atmosphere was 530°C. The flexural strength of glass fiber reinforced composites was about 592.7 MPa, and the shear strength was about 61.6 MPa, showing excellent mechanical properties. The high-tech thermosetting resin was toughened and enhanced at the same time without reducing heat resistance.

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用邻苯二腈封端的聚（芳基醚腈）增强的含三氟甲基的耐高温双邻苯二腈树脂及其复合材料的制备与性能

本研究以 4,4'-（六氟异丙亚基）双邻苯二腈（BFPh）为基础制备了一系列新型含三氟甲基的耐高温双邻苯二甲腈树脂，并通过不同含量的含六氟异丙亚基的邻苯二甲腈封端的聚（芳基醚腈）低聚物（FPEN-Ph）对其进行增韧。此外，还采用热压工艺制备了玻璃纤维增强复合材料。傅立叶变换红外光谱和 1HNMR 对低聚物的结构进行了表征。通过 DSC 对混合物的固化行为进行了研究。此外，还研究了热稳定性和机械性能。结果表明，引入适当含量的 FPEN-Ph 可以提高固化反应的反应活性。TGA 和 DMA 结果表明，固化聚合物和复合材料具有优异的热性能。在 800°C 时，FPEN-Ph 含量为 10%时的残余质量为 72.4%，惰性气氛下的 5%热降解温度（T5%）为 530°C。玻璃纤维增强复合材料的抗弯强度约为 592.7 兆帕，抗剪强度约为 61.6 兆帕，具有优异的力学性能。在不降低耐热性的情况下，高科技热固性树脂同时得到了增韧和增强。

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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.