Study on toughness improvement of a rosin-sourced epoxy matrix composite for green aerospace application †

Hu, Dongyuan, Zhang, Xvfeng, Liu, Xiaoling, Qin, Zhen, Hu, Li, Rudd, Chris, and Yi, Xiaosu (2020) Study on toughness improvement of a rosin-sourced epoxy matrix composite for green aerospace application †. Journal of Composites Science, 4 (4). 168.

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A high temperature epoxy resin was formulated by using a rosin-sourced anhydride-type curing agent, i.e., maleopimaric acid (RAM), and a two-component epoxy consisting of an E51-type epoxy and a solid phenolic epoxy to form a bio-sourced green matrix resin. The glass transition temperature of the final resin was 238 C Carbon fiber composite prepreg and was manufactured and laminated into composite specimens. Interleaving Toughening Technology (ITT) was applied to the laminates by using Polyamide interleaf veils. The interlaminar fracture toughness and compression after impact (CAI) strength were investigated and showed that the opening Mode I interlaminar fracture toughness GIC and the Mode II interlaminar fracture toughness GIIC of the specimens with interleaves were significantly improved from 227.51 J/m to 509.22 J/m and 1064.3 J/m to 1510.8 J/m , respectively. Correspondingly, the drop-weight impact test shows that the interleaves reduced the impact damage area from 20.9% to 11.3% of the total area, and the CAI residual strength was increased from 144 MPa to 191 MPa. Meanwhile, mechanical tests showed that the in-plane properties of the interleaved laminates were slightly reduced due to carbon fiber volume fraction reduction. In conclusion, the high glass transition temperature, fracture toughness and CAI behaviour make the green resin matrix composite a potential candidate for aerospace applications.

Item ID: 67975
Item Type: Article (Research - C1)
ISSN: 2504-477X
Keywords: CAI, Glass transition temperature, In-plane mechanical properties, Interleaving toughening, Rosin-sourced epoxy resin, Toughness
Copyright Information: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open accessarticle distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (
Funders: Ningbo HTZ, Shanghai Key Laboratory of Spacecraft Mechanism (SKLSM)
Projects and Grants: SKLSM 18DZ2272200
Date Deposited: 25 May 2021 02:48
FoR Codes: 40 ENGINEERING > 4001 Aerospace engineering > 400101 Aerospace materials @ 100%
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