Effects of the molecular structure of styrene-isoprene block copolymers on the interfacial characteristics of polystyrene/polyisoprene blends

Autor:	Jae Cheol Cho, Kie Hyun Nam, Won Ho Jo
Rok vydání:	1996
Předmět:	Materials science Polymers and Plastics Concentration effect Condensed Matter Physics Styrene Surface tension chemistry.chemical_compound chemistry Phase (matter) Critical micelle concentration Materials Chemistry Copolymer Polystyrene Physical and Theoretical Chemistry Composite material Isoprene
Zdroj:	Journal of Polymer Science Part B: Polymer Physics. 34:2169-2175
ISSN:	1099-0488 0887-6266
Popis:	The effects of the molecular structure of the styrene-isoprene block copolymer on the interfacial tension, the morphology and the interfacial adhesion of polystyrene/polyisoprene were investigated. A reduction in interfacial tension is observed with the addition of a small amount of copolymer, followed by a leveling off as the copolymer concentration exceeds the critical micelle concentration. The reduction in interfacial tension between polystyrene and polyisoprene is more significant when the isoprene-rich diblock copolymer is added than the cases when the symmetric or styrene-rich diblock copolymer is added. The interfacial tension data seem to be consistent with the phase morphology and the interfacial adhesion: the lower the interfacial tension, the smaller the domain size of dispersed phase and the better the interfacial adhesion. © 1996 John Wiley & Sons, Inc.
Databáze:	OpenAIRE
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