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Effect of NR/BR Blends ratio and Oil Content on the Mechanical Properties of Rubber Isolator at Low Temperature  

Kim, Wan-Doo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials)
Kim, Wan-Soo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials)
Woo, Chang-Soo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials)
Choi, Sung-Seen (Dept. of Applied Chemistry, Sejong University)
Publication Information
Elastomers and Composites / v.39, no.2, 2004 , pp. 95-104 More about this Journal
Abstract
New compounds were made using various NR/BR blend ratio and oil content to improve mechanical properties of rubber isolator at low temperature. Mechanical properties were investigated as a function of NR/BR blend ratio and oil content. Hardness and tensile modulus generally increased, but tensile strength and elongation at break decreased with increasing BR content. Hardness, tensile modulus and tensile strength decreased, but elongation at break were nearly the same with increasing oil content. The glass transition temperature of NR and BR were found to be $-50^{\circ}C$ and $-90^{\circ}C$ respectively based on the abrupt drops in storage elastic modulus and peak of loss factor. Two distinct transition temperature were observed in NR/BR blend compounds and each transition point was not affected by blend level indicating incompatible nature of NR/BR blend.
Keywords
natural rubber; butadiene rubber; low temperature; mechanical property; TR test;
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