Thermo-oxidative aging of epoxy coating systems

被引：39

作者：

Zahra, Y. ^{[1
,2
]}

Djouani, F. ^{[1
]}

Fayolle, B. ^{[1
]}

Kuntz, M. ^{[2
]}

Verdu, J. ^{[1
]}

机构：

[1] Arts & Metiers ParisTech ENSAM, Lab Procede & Ingn Mecan & Mat PIMM UMR8006, F-75013 Paris, France

[2] EDF R&D, Dept Mat & Mecan Composants, F-77250 Moret Sur Loing, France

来源：

PROGRESS IN ORGANIC COATINGS | 2014年 / 77卷 / 02期

关键词：

Epoxy; Coating; Jeffamine; Polyamidoamine; Oxidation; Degradation; THERMAL-OXIDATIVE DEGRADATION; RESIN; NETWORKS;

D O I：

10.1016/j.porgcoat.2013.10.011

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The thermo-oxidative behavior of unformulated (unfilled) samples of epoxy coatings has been studied at five temperatures ranging from 70 C to 150 C. Two epoxy networks based on diglycidyl ether of bisphenol A (DGEBA), respectively, cured by jeffamine (POPA) or polyamidoamine (PM) were compared. Infrared spectrophotometry (IR), differential scanning (DSC) and sol-gel analysis (SGA) were used to monitor structural changes. Thermal oxidation leads to carbonyl and amide formation in both systems. POPA systems appear more sensitive to oxidation than FAA ones. Thermal oxidation leads to predominant chain scission as evidenced by the decrease of glass transition temperatures (T-g) and increase of sol fraction. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：380 / 387

页数：8

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