Cardo poly (ether sulfone) toughened E51/DETDA epoxy resin and its carbon fiber composites

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2024-08-01 DOI:10.1016/S1872-5805(23)60741-3

Rong-peng Wu , Xing-hua Zhang , Xing-hai Wei , De-qi Jing , Wei-guo Su , Shou-chun Zhang

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引用次数: 0

Abstract

A toughener that can effectively improve the interlaminar toughness in carbon fiber composites is crucial for various applications. We investigated, the toughening effects of phenolphthalein-based cardo poly (ether sulfone) (PES-C) on E51/ DETDA epoxy and its carbon fiber composites (CFCs). Scanning electron microscopy showed that the phase structures of PES-C/epoxy blends change from island (of dispersed phase) structures to bi-continuous structures (of the matrix) as the PES-C content increased, which is associated with reaction-induced phase separation. After adding 15 phr PES-C, the glass transition temperature (Tg) of the blends increased by 51.5 °C, and the flexural strength, impact strength and fracture toughness of the blends were improved by 41.1%, 186.2% and 42.7%, respectively. These improvements could be attributed to the phase separation structure of the PES-C/epoxy system. A PES-C film was used to improve the mode-II fracture toughness (G_IIC) of CFCs. The G_IIC value of the 7 μm PES-C film toughened laminate was improved by 80.3% compared to that of the control laminate. The increase in G_IIC was attributed to cohesive failure and plastic deformation in the interleaving region.

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卡尔多聚（醚砜）增韧 E51/DETDA 环氧树脂及其碳纤维复合材料

能有效提高碳纤维复合材料层间韧性的增韧剂对于各种应用都至关重要。我们研究了酚酞基卡托聚（醚砜）（PES-C）对 E51/ DETDA 环氧树脂及其碳纤维复合材料（CFCs）的增韧效果。扫描电子显微镜显示，随着 PES-C 含量的增加，PES-C/环氧共混物的相结构从岛状（分散相）结构变为双连续结构（基体），这与反应引起的相分离有关。添加 15 phr PES-C 后，共混物的玻璃化转变温度（Tg）提高了 51.5 °C，共混物的抗弯强度、冲击强度和断裂韧性分别提高了 41.1%、186.2% 和 42.7%。这些改善可归因于 PES-C/epoxy 系统的相分离结构。PES-C 薄膜用于改善 CFC 的模态 II 断裂韧度（GIIC）。与对照层压板相比，7 μm PES-C 薄膜增韧层压板的 GIIC 值提高了 80.3%。GIIC 值的提高归因于交错区域的内聚破坏和塑性变形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.