Effect of chain topology on the self-organization and the mechanical properties of poly(n-butyl acrylate)-b-polystyrene block copolymers

摘要: Abstract A series of well defined ABA, 3-arm star and bottle brush type copolymers, containing soft poly(n-butyl acrylate) (PBA) blocks hard polystyrene (PS) were synthesized by atom transfer radical polymerization (ATRP). Small angle X-ray scattering was used to study the phase separation in these systems dynamic mechanical analysis tensile tests performed characterize their thermo-mechanical properties. The specific molecular architecture has a major effect on copolymers self-organization material linear ABA showed micro thermoplastic elastomer (TPE) behavior only at very high PS content. change from resulted an improved lower content better In contrast seems prevent PBA components, resulting amorphous bulk with single glass transition temperature.