Protection of epoxy resin against thermo-oxidation via cocuring epoxy/resole (II)

Authors
Lin, MS Chiu, CC
Citation
Ms. Lin et Cc. Chiu, Protection of epoxy resin against thermo-oxidation via cocuring epoxy/resole (II), POLYM DEGR, 71(2), 2001, pp. 327-329
Citations number
9
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER DEGRADATION AND STABILITY
ISSN journal
01413910 → ACNP
Volume
71
Issue
2
Year of publication
2001
Pages
327 - 329
Database
ISI
SICI code
0141-3910(2001)71:2<327:POERAT>2.0.ZU;2-X
Abstract
Cocured materials based on resole/epoxy in weight ratios of 100/0, 50/50 an d 0/100 were prepared by using NaOH and 4,4'-diaminodiphenylmethane (DMA) a s curing agents. These cocured samples were subjected to accelerated aging at 150 degreesC in air for 45 days. Continuous increase of carbonyl IR abso rption at 1700-1740 cm(-1) indicated thermal oxidation. The sample with res ole/epoxy = 50/50 showed significantly retarded formation of carbonyls. Mec hanical property tests of samples during the course of aging, including ten sile stress-strain, modulus, and impact resistance confirmed a significant protection of epoxy by incoporating resole into the epoxy via cocuring. (C) 2001 Elsevier Science Ltd. All rights reserved.