Micro- vs. macro-phase separation in binary blends of poly(styrene)-poly(isoprene) and poly(isoprene)-poly(ethylene oxide) diblock copolymers

Authors
Frielinghaus, H Hermsdorf, N Almdal, K Mortensen, K Messe, L Corvazier, L Fairclough, JPA Ryan, AJ Olmsted, PD Hamley, IW
Citation
H. Frielinghaus et al., Micro- vs. macro-phase separation in binary blends of poly(styrene)-poly(isoprene) and poly(isoprene)-poly(ethylene oxide) diblock copolymers, EUROPH LETT, 53(5), 2001, pp. 680-686
Citations number
14
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
02955075 → ACNP
Volume
53
Issue
5
Year of publication
2001
Pages
680 - 686
Database
ISI
SICI code
0295-5075(200103)53:5<680:MVMSIB>2.0.ZU;2-P
Abstract
In this paper we present an experimentally determined phase diagram of bina ry blends of the diblock copolymers poly(styrene)-poly(isoprene) and poly(i soprene)-poly(ethylene oxide). At high temperatures, the blends form an iso tropic mixture. Upon lowering the temperature, the blend macro-phase separa tes before micro-phase separation occurs. The observed phase diagram is com pared to theoretical predictions based on experimental parameters. In the l ow-temperature phase the crystallisation of the poly(ethylene oxide) block influences the spacing of the ordered phase.