scholarly journals Observation of internal relaxation modes during early state of spinodal decomposition in the isotopic polymer mixture d-PS/PS with SANS

1993 ◽  
Vol 03 (C8) ◽  
pp. C8-13-C8-16
Author(s):  
D. SCHWAHN ◽  
H. ECKERLEBE ◽  
E. HÄDICKE ◽  
T. SPRINGER
Keyword(s):  
Spinodal Decomposition ◽  
Polymer Mixture ◽  
Early State ◽  
Relaxation Modes

Validity of linear analysis in early-stage spinodal decomposition of a polymer mixture

2000 ◽  
Vol 113 (8) ◽  
pp. 3414-3422 ◽  
Author(s):  
Masaki Hayashi ◽  
Hiroshi Jinnai ◽  
Takeji Hashimoto
Keyword(s):  
Spinodal Decomposition ◽  
Early Stage ◽  
Linear Analysis ◽  
Polymer Mixture

Late stage spinodal decomposition of a binary polymer mixture. II. Scaling analyses on Qm(τ) and Im(τ)

1986 ◽  
Vol 85 (11) ◽  
pp. 6773-6786 ◽  
Author(s):  
Takeji Hashimoto ◽  
Masahiko Itakura ◽  
Nobuyuki Shimidzu
Keyword(s):  
Spinodal Decomposition ◽  
Late Stage ◽  
Polymer Mixture ◽  
Binary Polymer ◽  
Scaling Analyses

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.

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