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STYRENIC BLOCK COPOLYMER (SBC)

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STYRENIC BLOCK COPOLYMER (SBC)

Post  nancon77 on Fri Dec 23, 2011 2:43 am

Styrene-isoprene-styrene (SIS), styrene-butadiene-styrene (SBS), and styrene-ethylene/butylene-styrene (SEBS) block copolymers are known collectively as SBCs.

General details

Styrenic Block Copolymers (SBCs) are the largest-volume category of thermoplastic elastomers.

SBCs consist of at least three blocks, namely two hard polystyrene end blocks and one soft, elastomeric (polybutadiene, polyisoprene, either or not hydrogenated) midblock. It is essential that the hard and soft blocks are immiscible, so that, on a microscopic scale, the polystyrene blocks form separate domains in the rubber matrix, thereby providing physical cross links to the rubber.
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