Modeling Viscoelastic Properties of Triblock Copolymers: A DPD Simulation Study
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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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.
- Polymer Chemistry