To obtain rubber compound with satisfactory thermal and oil resistance properties, blends of CR(chloroprene rubber) with NBR(acrylonitrile-co-butadiene rubber) were prepared in a laboratory open mill following the polymer blinding method. Cure behavior of the blends, physical properties of vulcanizates, together with the aging and oil resistance properties were measured. The results indicated that the viscosity increased in the blends due to the increased rate of cure. Hardness, modulus, abrasion resistance of the blends increased over the simple additive rule, and tensile strength and elongation showed negative deviation from the additivity. Heat buildup, and volume expansion in aromatic oil showed negative deviation indicative of effective improvement in thermal and oil resistance upon blending.

내열 및 내유성이 공히 좋은 고무를 제조할 목적으로 open mill에서 CR/NBR 블렌드를 제조하였으며, 이들 블렌드의 가류특성, 가류고무의 물리특성, 노화 및 내유특성을 측정하였다. 블렌드의 점도, 경도, 탄성율 및 마모강도는 전반적으로 단순 혼합법칙 이상으로 증가하였으며, 인장강도 및 파단신율은 감소하였다. 또한, heat buildup및 방향족 기름에서의 체적팽창은 혼합법칙 이하로 억제되었다.

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