热老化材料的热学和比色参数评估：双酚A二缩水甘油醚/三亚乙基四胺体系及菲克织物增强环氧复合材料的研究

Thermal and Colorimetric Parameter Evaluation of Thermally Aged Materials: A Study of Diglycidyl Ether of Bisphenol A/Triethylenetetramine System and Fique Fabric-Reinforced Epoxy Composites.

作者信息

Oliveira Michelle Souza, Pereira Artur Camposo, Colorado Henry Alonso, Meliande Natalin Michele, da Cunha Juliana Dos Santos Carneiro, Figueiredo André Ben-Hur da Silva, Monteiro Sergio Neves

机构信息

Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil.

CComposites Laboratory, Universidad de Antioquia UdeA, Street 70, n° 52-21, Medellin 050010, Colombia.

出版信息

Polymers (Basel). 2023 Sep 14;15(18):3761. doi: 10.3390/polym15183761.

DOI:10.3390/polym15183761

PMID:37765616

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10536536/

Abstract

The main modifications of thermal and colorimetric parameters after thermal aging of DGEBA/TETA system (plain epoxy) and fique-fiber woven fabric-reinforced epoxy composites are described. As a preliminary study, thermal analysis was carried out on epoxy matrix composites reinforced with 15, 30, 40 and 50% fique-fiber woven fabric. After this previous analysis, the 40% composite was chosen to be thermally aged, at 170 °C. Three exposure times were considered, namely, 0, 72, 120 and 240 h. Samples were studied by thermogravimetric analysis (TGA), differential thermal analysis (DTA), differential scanning calorimetry (DSC), thermomechanical analysis (TMA) and colorimetry analysis. Significant color changes were observed after thermal aging combined with oxidation. It was also found that the thermal behavior of the plain epoxy showed greater resistance after thermal exposure. By contrast, the composites were more sensitive to temperature variations as a result of thermal stresses induced between fique fibers and the epoxy matrix.

摘要

描述了DGEBA/TETA体系（普通环氧树脂）和菲克纤维机织织物增强环氧复合材料热老化后热学和比色参数的主要变化。作为一项初步研究，对用15%、30%、40%和50%菲克纤维机织织物增强的环氧基复合材料进行了热分析。在此之前的分析之后，选择40%的复合材料在170°C下进行热老化。考虑了三个暴露时间，即0、72、120和240小时。通过热重分析（TGA）、差热分析（DTA）、差示扫描量热法（DSC）、热机械分析（TMA）和比色分析对样品进行了研究。热老化结合氧化后观察到显著的颜色变化。还发现普通环氧树脂在热暴露后的热性能表现出更大的抗性。相比之下，由于菲克纤维和环氧基体之间产生的热应力，复合材料对温度变化更敏感。