Three-Phase Model of Two-Component Blends Consisting of a Polystyrene-Polybutadiene Star Block Copolymer and a Polystyrene Homopolymer

被引：1
|
作者：
Lach, Ralf [1 ]
Satapathy, Bhabani K. [2 ]
Weidisch, Roland [3 ]
Grellmann, Wolfgang [1 ,4 ]
Knoll, Konrad [5 ]
机构：
[1] Polymer Serv GmbH Merseburg, Eberhard Leibnitz Str 2, D-06217 Merseburg, Germany
[2] Friedrich Schiller Univ Jena, Inst Mat Sci & Technol, Lobdergraben 32, D-07743 Jena, Germany
[3] Fraunhofer Inst Microstruct Mat & Syst IWMS, Walter Hulse Str 1, D-06120 Halle, Germany
[4] Martin Luther Univ Halle Wittenberg, Ctr Engn, D-06099 Halle, Germany
[5] BASF SE Polymer Res Thermoplast, GKT I-B1, D-67056 Ludwigshafen, Germany
来源：
MACROMOLECULAR SYMPOSIA | 2017年 / 373卷 / 01期
关键词：
amorphous star block copolymer/polystyrene blends; glass transition; interfaces; microstructure; toughness; MICROMECHANICAL DEFORMATION-BEHAVIOR; TRIBLOCK COPOLYMER; MECHANICAL-PROPERTIES; BINARY BLENDS; MORPHOLOGY; MICROSTRUCTURE; MISCIBILITY; HOMOPOLYSTYRENE; TRANSITION; TOUGHNESS;
D O I：
10.1002/masy.201600158
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Based on results of atomic force microscopy and dynamic mechanical analysis applied on binary blends of polystyrene (PS)-polybutadiene (PB) star block copolymers (ST3) having different compositions, a three-phase morphology that comprises PB-rich, PS/PB-mixed and PS-rich phase has been found. The pronounced enhancement of toughness in blends with 20-30 wt.-% PS homopolymer compared to pure ST3 can be understood by improvement of the stress transfer between the microdomains through the additional hPS-induced interfacial PS/PB-mixed volume fraction and the co-continuous morphology.
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页数：9
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