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Influence of Thermal Aging on the Properties of EPDM/Silicone Rubber Blends  

Chung Yu-Kyoung (Reliability Assessment Center, Korea Research Institute of Chemical Technology)
Lee Sung-Goo (Reliability Assessment Center, Korea Research Institute of Chemical Technology)
Cho Bong Rae (Department of Chemistry, Korea University)
Choi Kil-Yeong (Reliability Assessment Center, Korea Research Institute of Chemical Technology)
Publication Information
Polymer(Korea) / v.29, no.2, 2005 , pp. 166-171 More about this Journal
Abstract
EPDM (ethylene propylene diene monomer)/silicone rubber blends were prepared and the influence of a compatibilizer and thermal aging on the properties of the blends was investigated. The blends of which the compositions were varied in the range of 90/10 through $10/90\;wt\%$ were melt mixed by using a Brabender Plasticoder (internal mixer) and were vulcanized by a hot press. The morphology of the vulcanized EPDM/SR blends was examined by scanning electron microscopy (SEM). After the thermal Aging for 24, 48, 96 hrs at $100^{\circ}C$ in an air oven, hardness, tensile strength, elongation and contact angle of the blends were investigated. From the result of the morphology, it was confirmed that the domain size of the blends containing the compatibilizer was reduced. As the increase of the thermal aging time, hardness and tensile strength of the blends decreased but elongation and contact angle increased.
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