Accession Number:

ADA533578

Title:

Modeling Viscoelastic Properties of Triblock Copolymers: A DPD Simulation Study

Descriptive Note:

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

2009-08-01

Pagination or Media Count:

12.0

Abstract:

Gel systems based on self-assembled, amphiphilic ABA triblock copolymers in midblock-selective solvent form stable, spatially extended networks with controllable morphology and tunable viscoelastic behavior. In this work, we systematically evaluate the mechanical properties of these gels using morphology calculations, and a nonequilibrium oscillatory shear technique based on the dissipative particle dynamics DPD method. Our simulations demonstrate that low molecular weight triblock copolymers with incompatible blocks self-assemble into micelles connected with bridges and loop-like chains comprised of the solvent-selective polymer midblocks.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE