Title
Mechanical properties of weakly segregated block copolymers: 1. Synergism on tensile properties of poly(styrene-b-n-butylmethacrylate) diblock copolymers
Author
Weidisch, R.
Michler, G.H.
Fischer, H.
Arnold, M.
Hofmann, S.
Stamm, M.
Technisch Physische Dienst TNO - TH
Publication year
1999
Abstract
Mechanical properties of poly(styrene-b-n-butylmethacrylate) diblock copolymers, PS-b-PBMA, with different lengths of the polystyrene block were investigated. The copolymers display a composition range where the tensile strength of the block copolymers exceeds the values of the corresponding homopolymers. At a PS-content of 74 vol% not only the tensile strength but also the strain at break is higher than that of pure polystyrene. Furthermore, the absorbed energy shows a maximum at a polystyrene content of 29 vol%. This composition reveals a morphology of hexagonally packed PS-cylinders which turns out to be effective for the increase of toughness in PS-b-PBMA diblock copolymers. The improved mechnical properties of PS-b-PBMA diblock copolymers are discussed with respect to a possible correlation and synergism between phase behaviour, morphology, deformation mechanism, and interface formation. © 1998 Elsevier Science Ltd.
Subject
Block copolymers
Mechanical properties
Structure
Composition effects
Deformation
Energy absorption
Interfaces (materials)
Molecular structure
Morphology
Polyacrylates
Polystyrenes
Strain
Tensile strength
Polybutylmethacrylate
Block copolymers
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http://resolver.tudelft.nl/uuid:264db98e-3725-427b-a2f3-72cd440e69dc
DOI
https://doi.org/10.1016/s0032-3861(98)00196-7
TNO identifier
234958
ISSN
0032-3861
Source
Polymer, 40 (5), 1191-1199
Document type
article