Accession Number:

ADA532985

Title:

Macroscopic Modeling of A3B15A3 Triblock Copolymers in B Solvent

Descriptive Note:

Final rept.

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Report Date:

2010-11-01

Pagination or Media Count:

24.0

Abstract:

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.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE