Influence of Epoxy Resin Curing Kinetics on the Mechanical Properties of Carbon Fiber Composites

环氧树脂 材料科学 复合材料 固化(化学) 动力学 物理 量子力学
作者
Isidro Cruz-Cruz,Claudia Angélica Ramírez‐Herrera,Óscar Martínez-Romero,Santos Armando Castillo-Márquez,Isaac H. Jiménez-Cedeño,Daniel Olvera-Trejo,Alex Elías‐Zúñiga
出处
期刊:Polymers [Multidisciplinary Digital Publishing Institute]
卷期号:14 (6): 1100-1100 被引量:27
标识
DOI:10.3390/polym14061100
摘要

In this study, the kinetic parameters belonging to the cross-linking process of a modified epoxy resin, Aerotuf 275-34™, were investigated. Resin curing kinetics are crucial to understanding the structure–property–processing relationship for manufacturing high-performance carbon-fiber-reinforced polymer composites (CFRPCs). The parameters were obtained using differential scanning calorimetry (DSC) measurements and the Flynn–Wall–Ozawa, Kissinger, Borchardt–Daniels, and Friedman approaches. The DSC thermograms show two exothermic peaks that were deconvoluted as two separate reactions that follow autocatalytic models. Furthermore, the mechanical properties of produced carbon fiber/Aerotuf 275-34™ laminates using thermosetting polymers such as epoxies, phenolics, and cyanate esters were evaluated as a function of the conversion degree, and a close correlation was found between the degree of curing and the ultimate tensile strength (UTS). We found that when the composite material is cured at 160 °C for 15 min, it reaches a conversion degree of 0.97 and a UTS value that accounts for 95% of the maximum value obtained at 200 °C (180 MPa). Thus, the application of such processing conditions could be enough to achieve good mechanical properties of the composite laminates. These results suggest the possibility for the development of strategies towards manufacturing high-performance materials based on the modified epoxy resin (Aerotuf 275-34™) through the curing process.
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