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Effect of the mold temperature on the electrical properties of carbon-black-loaded polystyrene/SB block copolymer blends

✍ Scribed by Bluma G. Soares; Katia M. N. Gamboa; Angelo J. B. Ferreira; Edson Ueti; Sergio S. Camargo Jr.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
357 KB
Volume
69
Category
Article
ISSN
0021-8995

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✦ Synopsis

The electrical resistivities of a carbon-black-filled styrene-butadiene block copolymer (SB) and their blends with polystyrene were measured as a function of carbon content for specimens compression-molded at 200 and 250ЊC. The insulatorconductor point transition was greatly influenced by the mold temperature. This behavior associated to the scanning electronic microscopy investigations suggests the presence of some amount of the filler at the interface. A strong interaction between the filler and the polymer was also observed. The formation of bound rubber and a coherent rubber-filler gel depend on the molding conditions and the carbon black content in the composites.

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