基于环氧树脂基体并由聚砜薄膜增强的缠绕碳塑料的断裂韧性

Fracture Toughness of Winding Carbon Plastics Based on Epoxy Matrices and Reinforced by Polysulfone Film.

作者信息

Dzhangurazov Eldar B, Petrova Tuyara V, Shapagin Aleksey V, Tretyakov Ilya V, Korokhin Roman A, Kireynov Aleksey V, Alexeeva Olga V, Solodilov Vitaliy I, Yurkov Gleb Yu, Berlin Alexander Al

机构信息

N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia.

NTI Center "Digital Materials Science: New Materials and Substances", Bauman Moscow State Technical University, 105005 Moscow, Russia.

出版信息

Polymers (Basel). 2025 Jan 16;17(2):220. doi: 10.3390/polym17020220.

DOI:10.3390/polym17020220

PMID:39861292

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11768592/

Abstract

In this work, the fracture mechanism of winding carbon-fiber-reinforced plastics (CFRPs) based on epoxy matrices reinforced by polysulfone film was investigated. Two types of polymer matrices were used: epoxy oligomer (EO) cured by iso-methyltetrahydrophthalic anhydride (iso-MTHPA), and EO-modified polysulfone (PSU) with active diluent furfuryl glycidyl ether (FGE) cured by iso-MTHPA. At the winding stage, the reinforcing film was placed in the middle layer of the CFRP. The fracture toughness of the obtained CFRP was determined by the double-cantilever beam delamination method. Additionally, the effect of cyclic loading on the fracture toughness of CFRP reinforced with polysulfone film was investigated. It was shown that heterogeneous structures arising from the dissolution of the polysulfone film in the epoxy binder during the curing process increase the fracture toughness of CFRP from 0.5 kJ/m to 1.2 kJ/m. Application of cyclic loads had little effect on the fracture toughness value. As a result of this study, it was revealed that the macrocrack propagates near the reinforcement layer along the diffusion zone, which has a phase organization of the type PSU matrix-EO dispersion.

摘要

在这项工作中，研究了基于聚砜薄膜增强的环氧基体缠绕碳纤维增强塑料（CFRP）的断裂机理。使用了两种类型的聚合物基体：由异甲基四氢邻苯二甲酸酐（iso-MTHPA）固化的环氧低聚物（EO），以及由iso-MTHPA固化的含活性稀释剂糠基缩水甘油醚（FGE）的EO改性聚砜（PSU）。在缠绕阶段，增强薄膜置于CFRP的中间层。通过双悬臂梁分层法测定所得CFRP的断裂韧性。此外，研究了循环载荷对聚砜薄膜增强CFRP断裂韧性的影响。结果表明，在固化过程中聚砜薄膜在环氧粘合剂中溶解产生的异质结构使CFRP的断裂韧性从0.5 kJ/m提高到1.2 kJ/m。循环载荷的施加对断裂韧性值影响很小。这项研究的结果表明，宏观裂纹沿着具有PSU基体-EO分散体类型相组织的扩散区在增强层附近扩展。