TY - GEN
T1 - Numerical simulation of the phase separation of a polymer-polymer-solvent ternary system on a heterogeneously functionalized substrate
AU - Shang, Yingrui
AU - Kazmer, David
AU - Wei, Ming
AU - Barry, Carol
AU - Mead, Joey
PY - 2009
Y1 - 2009
N2 - The spinodal decomposition of a polymer-polymer-solvent ternary system was investigated in a 3-dimensional numerical model. The Cahn-Hilliard equation was employed to describe the free energy profile of the domain. A heterogeneously functionalized substrate was also implemented into the model to simulate the effect of substrate attraction. The mechanism of the morphology evolution was studied quantitatively. The well established linear relationship of the characteristic length, R(t) with t1/3 can be observed in the simulation results. The compatibility of the result pattern and the pattern on the substrate was measured by a scalar, Cs. The influence of the solvent concentration on the refinement of the result pattern was studied in this work. A critical time can be observed from the evolution of the value of Cs. The morphology evolution of a system considering the solvent evaporation was also studied.
AB - The spinodal decomposition of a polymer-polymer-solvent ternary system was investigated in a 3-dimensional numerical model. The Cahn-Hilliard equation was employed to describe the free energy profile of the domain. A heterogeneously functionalized substrate was also implemented into the model to simulate the effect of substrate attraction. The mechanism of the morphology evolution was studied quantitatively. The well established linear relationship of the characteristic length, R(t) with t1/3 can be observed in the simulation results. The compatibility of the result pattern and the pattern on the substrate was measured by a scalar, Cs. The influence of the solvent concentration on the refinement of the result pattern was studied in this work. A critical time can be observed from the evolution of the value of Cs. The morphology evolution of a system considering the solvent evaporation was also studied.
UR - http://www.scopus.com/inward/record.url?scp=70349116049&partnerID=8YFLogxK
U2 - 10.1115/IMECE2008-67209
DO - 10.1115/IMECE2008-67209
M3 - Conference contribution
AN - SCOPUS:70349116049
SN - 9780791848746
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 217
EP - 224
BT - 2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
T2 - 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Y2 - 31 October 2008 through 6 November 2008
ER -