Computational analysis of short‐range surface‐directed polymerization‐induced phase separation

2020 ◽  
Author(s):  
Shima Ghaffari ◽  
Philip K. Chan ◽  
Mehrab Mehrvar
Keyword(s):  
Phase Separation ◽  
Short Range ◽  
Computational Analysis ◽  
Polymerization Induced Phase Separation ◽  
Directed Polymerization

scholarly journals Long-Range Surface-Directed Polymerization-Induced Phase Separation: A Computational Study

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 256
Author(s):  
Shima Ghaffari ◽  
Philip K. Chan ◽  
Mehrab Mehrvar
Keyword(s):  
Phase Separation ◽  
Long Range ◽  
Spinodal Decomposition ◽  
Surface Potential ◽  
Computational Study ◽  
Polymer Mixture ◽  
Condensation Polymerization ◽  
Wetting Layer ◽  
Polymerization Induced Phase Separation ◽  
Directed Polymerization

The presence of a surface preferably attracting one component of a polymer mixture by the long-range van der Waals surface potential while the mixture undergoes phase separation by spinodal decomposition is called long-range surface-directed spinodal decomposition (SDSD). The morphology achieved under SDSD is an enrichment layer(s) close to the wall surface and a droplet-type structure in the bulk. In the current study of the long-range surface-directed polymerization-induced phase separation, the surface-directed spinodal decomposition of a monomer–solvent mixture undergoing self-condensation polymerization was theoretically simulated. The nonlinear Cahn–Hilliard and Flory–Huggins free energy theories were applied to investigate the phase separation phenomenon. The long-range surface potential led to the formation of a wetting layer on the surface. The thickness of the wetting layer was found proportional to time t*1/5 and surface potential parameter h11/5. A larger diffusion coefficient led to the formation of smaller droplets in the bulk and a thinner depletion layer, while it did not affect the thickness of the enrichment layer close to the wall. A temperature gradient imposed in the same direction of long-range surface potential led to the formation of a stripe morphology near the wall, while imposing it in the opposite direction of surface potential led to the formation of large particles at the high-temperature side, the opposite side of the interacting wall.

A Study of Polymerization-Induced Phase Separation as a Route to Produce Porous Polymer-Metal Materials

2010 ◽  
Vol 31 (18) ◽  
pp. 1635-1640 ◽  
Author(s):  
Stanislav Dubinsky ◽  
Alla Petukhova ◽  
Ilya Gourevich ◽  
Eugenia Kumacheva
Keyword(s):  
Phase Separation ◽  
Porous Polymer ◽  
Polymer Metal ◽  
Metal Materials ◽  
Polymerization Induced Phase Separation

Polymerization-induced phase separation III. Morphologies and contrast ratios of polymer dispersed liquid crystals

1997 ◽  
Vol 22 (2) ◽  
pp. 145-156 ◽  
Author(s):  
C. SERBUTOVIEZ ◽  
J. G. KLOOSTERBOER ◽  
H. M. J. BOOTS ◽  
F. A. M. A. PAULISSEN ◽  
F. J. TOUWSLAGER
Keyword(s):  
Phase Separation ◽  
Liquid Crystals ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
Polymerization Induced Phase Separation

Monitoring of polymerization-induced phase separation by simultaneous photo-d.s.c./turbidity measurements

Polymer ◽  
1996 ◽  
Vol 37 (26) ◽  
pp. 5937-5942 ◽  
Author(s):  
J.G. Kloosterboer ◽  
C. Serbutoviez ◽  
F.J. Touwslager
Keyword(s):  
Phase Separation ◽  
Polymerization Induced Phase Separation
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