Binary Resin-Curing Agent Systems for Fabricating Epoxy and Graphene Oxide-loaded Epoxy Films

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2023-03-10 DOI:10.1177/09540083231162513

Aziz Ahmadi-khaneghah, Sara Khosravi-ardakani, Abolfazl Jahani, Hossein Behniafar

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Abstract

In this research, diglycidyl ethers of bisphenol-A (BADGE) and polyethylene glycol (PEGDGE) were binarily cured with a mixture of diamine curing agents including isophorone diamine and polyethylene glycol diamine (PEGDA) in the absence/presence of aminated graphene oxide nanoplatelets (AGNPs, 0.5 wt.%). Four molar ratios of diglycidyl ethers and curing agents were used stoichiometrically in isothermal curing systems. The films prepared from the epoxy networks were entirely strong and pliable. All epoxy thermosets were evaluated using field emission-scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and diffuse reflectance-ultraviolet/visible spectroscopy (DR-UV/vis). The absorption coefficients of the epoxy and AGNPs-loaded epoxy materials decreased with increasing the molar ratio of PEGDGE resin and polyethylene glycol diamine curing agent. According to dynamic mechanical analysis no phase heterogeneity occurred in the structure of the prepared thermostats. When the thermoset materials were loaded by AGNPs filler, the peaks associated with alpha relaxations shifted to higher temperatures. Moreover, thermogravimetric analysis demonstrated that the thermal stability of the prepared epoxy thermosets slightly increased after the addition of the nanoplatelets. In addition, the thermal resistance of the prepared thermosets decreased to some extent by increasing the participation rate of monomers containing polyoxyethylene. Graphical Abstract

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制备环氧和氧化石墨烯负载环氧薄膜的二元树脂-固化剂体系

在本研究中，在不存在/存在胺化氧化石墨烯纳米片（AGNPs，0.5wt.%）的情况下，用包括异佛尔酮二胺和聚乙二醇二胺（PEGDA）的二胺固化剂的混合物对双酚A（BADGE）和聚乙二醇（PEGDGE）的二缩水甘油醚进行二元固化系统。由环氧网络制备的薄膜是完全坚固和柔韧的。使用场发射扫描电子显微镜（FE-SEM）、傅立叶变换红外（FT-IR）光谱、X射线衍射（XRD）和漫反射紫外/可见光谱（DR-UV/vis）对所有环氧热固性材料进行评估。环氧树脂和AGNPs负载的环氧材料的吸收系数随着PEGDGE树脂和聚乙二醇二胺固化剂的摩尔比的增加而降低。根据动态力学分析，制备的恒温器的结构中没有出现相不均匀性。当热固性材料由AGNPs填料负载时，与α弛豫相关的峰转移到更高的温度。此外，热重分析表明，添加纳米片后，制备的环氧热固性树脂的热稳定性略有提高。此外，通过提高含聚氧乙烯单体的参与率，制备的热固性树脂的热阻在一定程度上降低。图形摘要

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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.