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Compatibilization efficiency of styrene‐butadiene block copolymers as a function of their block number
Author(s) -
Vranješ Nina,
Lednický František,
Kotek Jiří,
Baldrian Josef,
Rek Vesna,
Fortelný Ivan,
Horák Zdeněk
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27658
Subject(s) - compatibilization , copolymer , materials science , small angle x ray scattering , polybutadiene , polystyrene , polymer chemistry , polymer blend , styrene , scanning electron microscope , phase (matter) , chemical engineering , composite material , polymer , scattering , chemistry , organic chemistry , optics , physics , engineering
Abstract Effect of block number in linear styrene‐butadiene (SB) block copolymers (BCs) on their compatibilization efficiency in blending polystyrene (PS) with polybutadiene (PB) was studied. Di‐, tri‐, or pentablocks of SB copolymers as well as their combinations were blended with the mentioned homopolymers; supramolecular structure determined by small angle X‐ray scattering method (SAXS), morphology using scanning electron microscopy (SEM) combined with image analysis (IA), and stress transfer characteristics of the blends were chosen as criteria of compatibilization efficiency of the copolymers used. It was proved that the addition of SB BCs led to remarkably finer phase structure and substantially higher toughness of PS/PB blends. Triblock copolymer showed to be the compatibilizer with higher efficiency than diblock, pentablock, and the di/triblock copolymer mixture. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008