Mechanical and tribological properties of epoxy modified by liquid carboxyl terminated poly(butadiene-co-acrylonitrile) rubber

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Author listChonkaew W., Sombatsompop N.

PublisherWiley

Publication year2012

JournalJournal of Applied Polymer Science (0021-8995)

Volume number125

Issue number1

Start page361

End page369

Number of pages9

ISSN0021-8995

eISSN1097-4628

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84859625985&doi=10.1002%2fapp.35580&partnerID=40&md5=7bbad5fa47f1a0cee834c8b3417eba48

LanguagesEnglish-Great Britain (EN-GB)


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Abstract

Diglycidyl ether of bisphenol A (DGEBA)-based epoxy resin was modified using liquid carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) rubber. The liquid CTBN contents used ranged from 2.5 to 20 parts per hundred parts of resin (phr). Mechanical properties of the modified resins were evaluated and the microstructures of the fracture surfaces were examined using SEM technique. The changes in storage modulus and the glass transition temperature were also evaluated using dynamic mechanical analysis (DMA). The tribological tests were performed using a ball-on-disc tribometer. The worn surfaces and the ball counter-mates after tribological tests were investigated using optical microscope technique. The results revealed the influence of liquid CTBN content on mechanical and tribological properties, and also microstructure of the modified epoxy resins. Impact resistance increased whereas the storage modulus and the hardness decreased when the CTBN rubber was introduced to the epoxy network. The coefficient of friction of the CTBN-modified epoxy was lower than that of the neat epoxy. The CTBN content of lower than 10 phr was recommended for improving the wear resistance of epoxy resin. Changes in tribological properties of the CTBN-modified epoxy correspond well to those in mechanical changes, especially the toughness properties. Copyright ฉ 2011 Wiley Periodicals, Inc.


Keywords

rubber-modified epoxy resintoughnesstribological properties


Last updated on 2023-17-10 at 07:35