Identification of relaxation processes in the dynamic structure factor of diblock copolymers. Far from the ordering transition

G. Fytas*, R. Sigel, S. Pispas, D. Vlassopoulos, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

The dynamic structure factor S(q,t) of entangled solutions of ultra high molecular weight styrene-isoprene (SI) diblock copolymers in a common good solvent (toluene) is explored by photon correlation spectroscopy. One symmetric and two asymmetric SI samples with two and five fractionations were examined. In the disordered state, the order parameter fluctuations relax via two distinct chain relaxations (fast Rouse and slow reputation) and chain diffusion. This relaxation mechanism is S(q,t) is valid only in the homogeneous region, away from the strong fluctuations.

Original languageEnglish (US)
Pages (from-to)1024-1025
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume40
Issue number2
StatePublished - Aug 1 1999

ASJC Scopus subject areas

  • Polymers and Plastics

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