ORDERING AND VISCOELASTIC RELAXATION IN MULTIARM STAR POLYMER MELTS

Authors
VLASSOPOULOS D PAKULA T FYTAS G ROOVERS J KARATASOS K HADJICHRISTIDIS N
Citation
D. Vlassopoulos et al., ORDERING AND VISCOELASTIC RELAXATION IN MULTIARM STAR POLYMER MELTS, Europhysics letters, 39(6), 1997, pp. 617-622
Citations number
21
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
39
Issue
6
Year of publication
1997
Pages
617 - 622
Database
ISI
SICI code
0295-5075(1997)39:6<617:OAVRIM>2.0.ZU;2-G
Abstract
We present small-angle X-ray scattering measurements in model star hom opolymer melts with high functionality, revealing liquid-like ordering . Monte Carlo simulations attribute this structure to the nonuniform i ntramolecular segmental mass distribution, which results in core-shell topology. This ordering is also reflected in their linear viscoelasti c response as a new structural mode at low frequencies, due to coopera tive rearrangements of the stars.