Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 7, Pages 2891-2904Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2010.10.087
Keywords
Plasma; Rubber; Co-curing process; Peel
Categories
Funding
- All India Council for Technical Education (AICTE), New Delhi
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Vulcanized ethylene propylene diene polymethylene (EPDM) rubber surface was treated in a radio frequency capacitatively coupled low pressure argon/oxygen plasma to improve adhesion with compounded natural rubber (NR) during co-vulcanization. The plasma modified surfaces were analyzed by means of contact angle measurement, surface energy, attenuated total reflection-infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive X-ray sulfur mapping and atomic force microscopy. Several experimental variables such as plasma power, length of exposure time and composition of the argon-oxygen gas mixture were considered. It was delineated that plasma treatment changed both surface composition and roughness, and consequently increased peel strength. The change in surface composition was mainly ascribed to the formation of C-O and -C = O functional groups on the vulcanized surfaces. A maximum of 98% improvement in peel strength was observed after plasma treatment. (C) 2010 Elsevier B.V. All rights reserved.
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