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Ellipsoidal core‐shell cylindrical microphases in PS‐ b ‐PB‐ b ‐PCL triblock copolymers with a crystallizable matrix
Author(s) -
Balsamo Vittoria,
Stadler Reimund
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971170119
Subject(s) - copolymer , materials science , shell (structure) , core (optical fiber) , ellipsoid , matrix (chemical analysis) , composite material , polymer , physics , astronomy
Polystyrene‐ block ‐polybutadiene‐ block ‐poly(ϵ‐caprolactone) SBC triblock copolymers with a PCL matrix exhibit microphase separation into three different phases within the spherulitic superstructures. Mixing of the PS‐block can occur upon melting of the PCL‐block if the molecular weight is low enough. Even though the crystallization takes place well below the PS‐glass transition, a deformation of the amorphous microphases into ellipsoidal core‐shell cylindrical microdomains is observed by TEM. These copolymers have mechanical properties which are dominated by the PCL (poly(ϵ‐caprolactone)) matrix with an influence of the amorphous blocks.