Aging of Organic Matrix Composite Materials
作者： Xavier Colin , Jacques Verdu
DOI: 10.1002/9781118097298.WEOC005
关键词:
摘要: This article deals with aging mechanisms and kinetics in organic matrix composites, focusing on water-polymer (humid aging) oxygen-polymer (thermo-oxidative interactions. The first section is devoted to problems common all kinds of chemical aging, emphasis specific aspects composite materials, for instance, role interphase/interface processes or anisotropy water oxygen diffusion fiber-reinforced materials. The effects mechanical loading the diffusion-reaction coupling are briefly evoked. The second humid aging. It important distinguish physical linked plasticization swelling polymer by (hydrolytic) an ionic step-by-step reaction, which affects only polycondensates, especially polyesters. Hydrolysis induces random chain scission responsible embrittlement sometimes osmotic cracking blistering glass fiber-polyester composites. The third concerns thermo-oxidative that results from a branched radical reaction. kind occurs when material exposed high temperatures during its processing use conditions, case many aerospace applications. basics nonempirical kinetic modeling presented. last consequences thermo-oxidation thermomechanical properties including transition temperature, elastic properties, fracture properties. Keywords: organic composites; aging; water absorption; hydrolysis; thermo-oxidation; kinetics; embrittlement
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