Entangled triblock copolymer gel: Morphological and mechanical properties
TL Chantawansri and TW Sirk and YR Sliozberg, JOURNAL OF CHEMICAL PHYSICS, 138, 024908 (2013).
The morphological and mechanical properties of entangled ABA triblock copolymer gels, where solvent were selective to the midblock, were studied as a function of polymer concentration using a novel dissipative particle dynamics model which includes a modified segmental repulsive potential that restricts chain crossing. Morphological properties, such as micelle size, distance between micelles, and the bridge fraction, were calculated as a function of concentration. Although the micelle size was shown to have a strong dependence on concentration, the bridge fraction and distance between micelles were shown to plateau at moderate concentrations. Deformation under uni-axial tension was also performed to extract the cross-link and entanglement contribution to the elastic modulus. Scaling results qualitatively agree with other theoretical predications. http://dx.doi.org/10.1063/1.4774373
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