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环氧树脂固化动力学对碳纤维复合材料力学性能的影响

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

作者信息

Cruz-Cruz Isidro, Ramírez-Herrera Claudia A, Martínez-Romero Oscar, Castillo-Márquez Santos Armando, Jiménez-Cedeño Isaac H, Olvera-Trejo Daniel, Elías-Zúñiga Alex

机构信息

Mechanical Engineering and Advanced Materials Department, School of Engineering and Science, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501 Sur, Monterrey, N. L. 64849, Mexico.

Vertiv, Ave. Luis Guadalupe Fernandez 3502 Parque Industrial FINSA Santa Catarina, Santa Catarina, N. L. 66380, Mexico.

出版信息

Polymers (Basel). 2022 Mar 9;14(6):1100. doi: 10.3390/polym14061100.

DOI:10.3390/polym14061100
PMID:35335432
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8952319/
Abstract

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.

摘要

在本研究中，对一种改性环氧树脂Aerotuf 275-34™交联过程的动力学参数进行了研究。树脂固化动力学对于理解制造高性能碳纤维增强聚合物复合材料（CFRPCs）的结构-性能-加工关系至关重要。这些参数是通过差示扫描量热法（DSC）测量以及弗林-沃尔-小泽法、基辛格法、博查特-丹尼尔斯法和弗里德曼法获得的。DSC热谱图显示出两个放热峰，经去卷积处理后为遵循自催化模型的两个独立反应。此外，对使用环氧树脂、酚醛树脂和氰酸酯等热固性聚合物制备的碳纤维/Aerotuf 275-34™层压板的力学性能作为转化率的函数进行了评估，发现固化程度与极限拉伸强度（UTS）之间存在密切相关性。我们发现，当复合材料在160°C下固化15分钟时，其转化率达到0.97，UTS值占在200°C（180 MPa）下获得的最大值的95%。因此，应用这样的加工条件可能足以实现复合层压板良好的力学性能。这些结果表明，有可能通过固化过程开发基于改性环氧树脂（Aerotuf 275-34™）制造高性能材料的策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4ee7/8952319/f30dcab96117/polymers-14-01100-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4ee7/8952319/5558baa3ee21/polymers-14-01100-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4ee7/8952319/95bd66676e81/polymers-14-01100-g011.jpg
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