TY - JOUR
T1 - Multicomponent diffusion in phase-separating polymer blends with different frictional interactions
T2 - A mean-friction model
AU - Yamamura, Masato
AU - Kajiwara, Toshihisa
AU - Kage, Hiroyuki
N1 - Funding Information:
The authors gratefully acknowledge the comments of our reviewers. This work was supported in part by the Grant-in-Aid (No. 14750608) for Encouragement of Young Scientists from Japan Society for the Promotion of Science.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2003/9
Y1 - 2003/9
N2 - We present a compact formula for describing the mean frictional forces acting on a molecule in multicomponent systems. The friction-based diffusion theory of Zielinski and Hanley was extended to newly include the friction-average molar velocity as a reference frame. The results showed that the previous diffusion theories are unified by the friction-average concept by properly choosing the average velocity. The present model based on the diffusivity-related molar average velocity provides better predictions for the diffusive flux in a ternary miscible liquid compared to the other existing theories. The application of the model in phase-separating ternary systems revealed that the introduction of a highly diffusive third component into demixing polymer blends promotes a particular enhancement of the spinodal decomposition due to the difference in the frictional interactions between polymers.
AB - We present a compact formula for describing the mean frictional forces acting on a molecule in multicomponent systems. The friction-based diffusion theory of Zielinski and Hanley was extended to newly include the friction-average molar velocity as a reference frame. The results showed that the previous diffusion theories are unified by the friction-average concept by properly choosing the average velocity. The present model based on the diffusivity-related molar average velocity provides better predictions for the diffusive flux in a ternary miscible liquid compared to the other existing theories. The application of the model in phase-separating ternary systems revealed that the introduction of a highly diffusive third component into demixing polymer blends promotes a particular enhancement of the spinodal decomposition due to the difference in the frictional interactions between polymers.
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U2 - 10.1016/S0009-2509(03)00313-0
DO - 10.1016/S0009-2509(03)00313-0
M3 - Article
AN - SCOPUS:0141461497
SN - 0009-2509
VL - 58
SP - 3891
EP - 3899
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 17
ER -