Evidence of thermo-oxidation phenomena occurring during hygrothermal aging of thermosetting resins for RTM composite applications

被引：33

作者：

Simar, A. ^{[1
,2
]}

Gigliotti, M. ^{[1
]}

Grandidier, J. C. ^{[1
]}

Ammar-Khodja, I. ^{[2
]}

机构：

[1] Univ Poitiers, Inst P CNRS, Dept Phys & Mech Mat, ENSMA,UPR 3346, Chasseneuil, France

[2] Aircelle, Grp Safran, Mat & Proc Dept, Gonfreville Lorcher, France

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2014年 / 66卷

关键词：

Theromosetting resin; Environmental degradation; Analytical modelling; Mechanical testing; WATER DIFFUSION; VISCOELASTIC MATERIALS; MECHANICAL-PROPERTIES; MOISTURE DIFFUSION; THERMAL-OXIDATION; EPOXY-RESIN; MODEL; ABSORPTION; POLYMERS; MATRICES;

D O I：

10.1016/j.compositesa.2014.07.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper focuses on the humid aging of a high temperature thermosetting resin employed for the realization of aircraft parts manufactured by the RTM process. Accelerated humid aging at several different temperatures (40-90 degrees C) and relative humidity values (50-100%) has been carried out by means of gravimetric tests. Anomalous behavior with respect to Fick's diffusion law and a color gradient from the edge to the center of the samples has been observed. Drying of samples after aging and mechanical tests on aged and dried samples have shown the existence of irreversible phenomena taking place during humid ageing: uniform tensile tests revealed resin embrittlement, Ultra Micro Indentation tests allowed measuring a gradient of properties from the surface to the centre of the samples. This behavior - associated to the color changes observed on aged samples - indicates that oxidation phenomena take place during hygrothermal aging. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：175 / 182

页数：8