Macroscopic Modeling of A3B15A3 Triblock Copolymers in B Solvent
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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We have performed dynamic density functional theory calculations for an ABA triblock copolymer immersed in a B-attractive solvent. The triblock copolymer was parameterized for polystyrene-b-ethylene-co-butylene-b-styrene SEBS, while the solvent was parameterized for the hydrocarbon oil tetradecane C14. The effect of the solvent concentration and SEB interaction on the morphology was studied. For a 5050 vol. mixture of polymersolvent, we also considered the effect of solvent molecular weight on the morphology, where we observed a transition between micro- and macro-phase separation at a critical molecular weight. Lastly, elastic properties were calculated using a finite-element based mechanical homogenization method.
- Physical Chemistry
- Polymer Chemistry