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

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 250°C. The insulator–conductor point transition was greatly influenced by the mold...

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Bibliographic Details
Published in:Journal of applied polymer science 1998-07, Vol.69 (4), p.825-833
Main Authors: Soares, Bluma G., Gamboa, Katia M. N., Ferreira, Angelo J. B., Ueti, Edson, Camargo Jr, Sergio S.
Format: Article
Language:English
Subjects:
Applied sciences
carbon black
Composites
electrical conductivity
Exact sciences and technology
Forms of application and semi-finished materials
polymer blend
Polymer industry, paints, wood
styrene-butadiene block copolymer
Technology of polymers
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Summary: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 250°C. The insulator–conductor 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. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 825–833, 1998
ISSN:0021-8995
1097-4628
DOI:10.1002/(SICI)1097-4628(19980725)69:4<825::AID-APP22>3.0.CO;2-M