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천연고무/부타디엔고무(NR/BR) 혼합고무와 황동피복코드의 접착성질

Adhesion between NR/BR Blended Rubber Compound and Brass-plated Steel Cord

전경수 손봉영 정승원 조평래 조춘택 서곤

Jeon GS Sohn BY Jeong SW Cho PL Cho CT Seo G

HWAHAK KONGHAK, February 1997, 35(1), 90-95(6), NONE

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Abstract

천연고무(NR고무)와 부타디엔고무(BR고무)의 혼합고무에 대한 물성과 황동피복코드의 접착성질을 조사하였다. BR고무 혼합량이 많아지면 가황된 사슬의 끊어짐(reversion)이 억제되어 가교밀도가 커진다. 이에 따라 영률은 증가되나 파열점에서 측정되는 인장강도와 연신율은 파열에너지 저하로 낮아진다. 접착시편에서 높은 고무부착정도는 접착계면 강도가 고무층에 비해 상대적으로 크다는 것을 보여준다. BR고무가 증가함에 따라 뽑는 힘이 감소한다. 뽑는 힘과 혼합고무의 인장강도의 좋은 상관성은 뽑는 힘이 혼합고무의 피로성질에 주로 관련이 있음을 나타낸다. 황동피복코드와 접착에 대한 NR고무와 BR고무간 상호작용은 나타나지 않았다.

Physical properties and adhesion characteristics of blended rubber compounds composed of natural rubber(NR) and butadiene rubber(BR) were investigated. With increasing BR content, crosslinking density was increased due to the inhibition of reversion. As a result, Young’s modulus was increased, while tensile strength and elongation measured at break point was decreased due to the decrease of tear energy. High values of rubber coverage of these adhesion test samples showed that the strength of adhesion interface was relatively higher than that of rubber layer. Pullout forces decreased with increase in the BR content. A good relationship between pullout force and tensile strength of the blend is observed, indicating that pullout force is mainly dependent on the fatigue properties of the blend. Interaction between NR and BR in the blended rubber compounds for the adhesion with brass-plated steel cord was not observed.

Keywords

Adhesion Rubber Compounds Steel Cord NR/BR Blends Tear Energy

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