High-performance quinoxaline-containing phthalonitrile resin: Synthesis, curing kinetics, and properties

IF 1.8 4区化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2024-04-03 DOI:10.1177/09540083241244466

Dianqiu Jia, Han Zhao, Jianxin Rong, Xinggang Chen, Zhiyi Jia, Dengke Li, Xiaoyan Yu, Qingxin Zhang

引用次数: 0

Abstract

A novel quinoxaline-based phthalonitrile monomer, namely, 4,4′-(((quinoxaline-2,3-diylbis (oxy))bis (3,1-phenylene))bis (oxy))di-phthalonitrile (QDOP), was successfully synthesized by nucleophilic substitution reaction, which exhibits a low melting point (85°C) and a wide processing window (150°C). The QDOP monomer was cured with 4-aminophenoxy phthalonitrile (APPH) as catalyst by different temperature programs, and the curing process and kinetics were discussed in detail by non-isothermal differential scanning calorimetric (DSC). The QDOP polymer mainly forms triazine, isoindoline and phthalocyanine structure, as revealed by Fourier transform infrared (FTIR) spectroscopy, and its properties improved with the increase of post-curing temperature and curing time. After post-curing at 380°C, the polymer exhibited high storage modulus (3731 MPa), high glass-transition temperature (>400°C), and outstanding thermal stability and thermal oxidation stability.

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高性能含喹喔啉的邻苯二腈树脂：合成、固化动力学和性能

通过亲核取代反应成功合成了一种新型喹喔啉基邻苯二甲腈单体，即 4,4′-(((喹喔啉-2,3-二基双(氧基))双(3,1-苯基))双(氧基))二邻苯二甲腈（QDOP），该单体熔点低（85°C），加工窗口宽（150°C）。以对氨基苯氧基邻苯二甲腈（APPH）为催化剂，通过不同温度程序固化了 QDOP 单体，并利用非等温差示扫描量热法（DSC）详细讨论了固化过程和动力学。傅立叶变换红外光谱（FTIR）显示，QDOP聚合物主要形成三嗪、异吲哚啉和酞菁结构，其性能随后固化温度和固化时间的增加而改善。在 380°C 后固化后，该聚合物表现出较高的储存模量（3731 兆帕）、较高的玻璃化转变温度（400°C）以及出色的热稳定性和热氧化稳定性。

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

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.