MECHANICAL-PROPERTIES OF WEAKLY SEGREGATED BLOCK-COPOLYMERS - 1 - SYNERGISM ON TENSILE PROPERTIES OF POLY(STYRENE-B-N-BUTYLMETHACRYLATE) DIBLOCK COPOLYMERS

Authors
WEIDISCH R MICHLER GH FISCHER H ARNOLD M HOFMANN S STAMM M
Citation
R. Weidisch et al., MECHANICAL-PROPERTIES OF WEAKLY SEGREGATED BLOCK-COPOLYMERS - 1 - SYNERGISM ON TENSILE PROPERTIES OF POLY(STYRENE-B-N-BUTYLMETHACRYLATE) DIBLOCK COPOLYMERS, Polymer, 40(5), 1999, pp. 1191-1199
Citations number
36
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
40
Issue
5
Year of publication
1999
Pages
1191 - 1199
Database
ISI
SICI code
0032-3861(1999)40:5<1191:MOWSB->2.0.ZU;2-W
Abstract
Mechanical properties of poly(styrene-b-n-butylmethacrylate) diblock c opolymers, PS-b-PBMA, with different lengths of the polystyrene block were investigated. The copolymers display a composition range where th e tensile strength of the block copolymers exceeds the values of the c orresponding homopolymers. At a PS-content of 74 vol% not only the ten sile strength but also the strain at break is higher than that of pure polystyrene. Furthermore, the absorbed energy shows a maximum at a po lystyrene content of 29 vol%. This composition reveals a morphology of hexagonally packed PS-cylinders which turns out to be effective for t he increase of toughness in PS-b-PBMA diblock copolymers. The improved properties of PS-b-PBMA diblock copolymers are discussed with respect to a possible correlation and synergism between phase behaviour, morp hology, deformation mechanism, and interface formation. (C) 1998 Elsev ier Science Ltd. All rights reserved.