Morphology and micromechanical deformation behavior of styrene/butadiene-block copolymers. I. Toughening mechanisms in asymmetric star block copolymers
作者： G. H. Michler , R. Adhikari , W. Lebek , S. Goerlitz , R. Weidisch
DOI: 10.1002/APP.10540
关键词:
摘要: Lamellae-forming styrene/butadiene star block copolymers are studied to investigate the influence of morphology on micromechanical deformation mechanisms and mechanical properties by using transmission electron microscopy tensile testing. A large homogeneous plastic polystyrene (PS) lamellae is found in basis new mechanism called thin-layer yielding. This depends strongly thickness PS lamellae. At a critical about 20 nm, transition from yielding crazelike was observed. These zones similar crazes with respect their propagation perpendicular direction external stress shear bands an internal component zones. As result our investigations, can be understood correlation mechanisms. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 683–700,
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