Improving adhesion properties between rubber compound and brass-plated steel cord by the addition of epoxidized natural rubber to rubber compound |
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Authors: | Gyung Soo Jeon Min Hyeon Han Gon Seo |
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Affiliation: | (1) Department of Chemical Technology, Provincial College of Damyang, 517-800 Chonnam, South Korea;(2) Kumho Tire Co. & Ltd.,R&D Center, 506-040 Kwangju, South Korea;(3) Department of Chemical Technology, Chonnam National University, 500-757 Kwangju, South Korea |
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Abstract: | The adhesion between a rubber compound containing epoxidized natural rubber (ENR) and a brassplated steel cord was studied
to shed light on the role of ENR for the improvement of adhesion. The addition of ENR in the rubber compound caused cure rate
to decrease, and as ENR loading increased, modulus and hardness increased while tensile strength and elongation at break decreased.
An improvement of adhesion was obvious with low loading of ENR at the range of 2 phr, while an adverse effect was observed
with higher concentrations of 10 phr. Since the ratio of sulfur to copper at the interphase of the rubber compound/brass film
adhesion sample increases with increased ENR loading up to 2 phr, the acceleration of sulfide formation by ENR could be proven.
Adequate curing of rubber and the formation of high-molecular layer at the interphase by addition of small amount of ENR improve
adhesion. However, the toughening of the rubber caused by the addition of larger amounts of ENR degrades the adhesion due
to the poor physical properties of the rubber compound. |
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Keywords: | Adhesion Interphase Rubber-to-Brass Bonding Adhesion Promoter AES Depth Profile Epoxidized Natural Rubber |
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