Mode-selection in phase separation of polymer mixtures driven by photochemical reactions

1999 ◽  
Author(s):  
Qui Tran-Cong ◽  
Kouichi Endoh ◽  
Junji Kawai
Keyword(s):  
Phase Separation ◽  
Mode Selection ◽  
Photochemical Reactions ◽  
Polymer Mixtures

Phase separation of polymer mixtures driven by photochemical reactions: Complexity and fascination

2011 ◽  
Vol 15 (6) ◽  
pp. 254-261 ◽  
Author(s):  
Qui Tran-Cong-Miyata ◽  
Tomokazu Kinohira ◽  
Dan-Thuy Van-Pham ◽  
Atsuko Hirose ◽  
Tomohisa Norisuye ◽  
...  
Keyword(s):  
Phase Separation ◽  
Photochemical Reactions ◽  
Polymer Mixtures

scholarly journals Gelation Impairs Phase Separation and Small Molecule Migration in Polymer Mixtures

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1576
Author(s):  
Biswaroop Mukherjee ◽  
Buddhapriya Chakrabarti
Keyword(s):  
Phase Separation ◽  
Rational Design ◽  
Surface Segregation ◽  
Multiscale Methods ◽  
Coarse Grained ◽  
Polymer Gel ◽  
Polymer Mixtures ◽  
Separation Processes ◽  
Surface Migration ◽  
Wide Range

Surface segregation of the low molecular weight component of a polymeric mixture is a ubiquitous phenomenon that leads to degradation of industrial formulations. We report a simultaneous phase separation and surface migration phenomena in oligomer–polymer ( O P ) and oligomer–gel ( O G ) systems following a temperature quench that induces demixing of components. We compute equilibrium and time varying migrant (oligomer) density profiles and wetting layer thickness in these systems using coarse grained molecular dynamics (CGMD) and mesoscale hydrodynamics (MH) simulations. Such multiscale methods quantitatively describe the phenomena over a wide range of length and time scales. We show that surface migration in gel–oligomer systems is significantly reduced on account of network elasticity. Furthermore, the phase separation processes are significantly slowed in gels leading to the modification of the well known Lifshitz–Slyozov–Wagner (LSW) law ℓ ( τ ) ∼ τ 1 / 3 . Our work allows for rational design of polymer/gel–oligomer mixtures with predictable surface segregation characteristics that can be compared against experiments.

scholarly journals Mechanisms of phase separation and aggregation in colloid-polymer mixtures

2001 ◽  
Vol 65 (1) ◽  
Author(s):  
V. J. Anderson ◽  
E. H. A. de Hoog ◽  
H. N. W. Lekkerkerker
Keyword(s):  
Phase Separation ◽  
Polymer Mixtures

Exploring the dynamics of phase separation in colloid–polymer mixtures with long range attraction

Soft Matter ◽  
2016 ◽  
Vol 12 (24) ◽  
pp. 5325-5333 ◽  
Author(s):  
Juan Sabin ◽  
Arthur E. Bailey ◽  
Barbara J. Frisken
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
Long Range ◽  
Dynamic Scaling ◽  
Polymer Mixtures

Dynamic scaling and growth of structure in colloid–polymer samples spanning the phase diagram depend primarily on the strength of attraction.

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