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- W2951031181 abstract "Much work has been devoted to analysing thermodynamic models for solid dispersions with a view to identifying regions in the phase diagram where amorphous phase separation or drug recrystallization can occur. However, detailed partial differential equation non-equilibrium models that track the evolution of solid dispersions in time and space are lacking. Hence theoretical predictions for the timescale over which phase separation occurs in a solid dispersion are not available. In this paper, we address some of these deficiencies by (i) constructing a general multicomponent diffusion model for a dissolving solid dispersion; (ii) specializing the model to a binary drug/polymer system in storage; (iii) deriving an effective concentration dependent drug diffusion coefficient for the binary system, thereby obtaining a theoretical prediction for the timescale over which phase separation occurs; and (iv) presenting a detailed numerical investigation of the HPMCAS/Felodipine system assuming a Flory-Huggins activity coefficient. The numerical simulations exhibit numerous interesting phenomena, such as the formation of polymer droplets and strings, Ostwald ripening/coarsening, phase inversion, and droplet-to-string transitions." @default.
- W2951031181 created "2019-06-27" @default.
- W2951031181 creator A5046203971 @default.
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- W2951031181 date "2019-08-01" @default.
- W2951031181 modified "2023-10-16" @default.
- W2951031181 title "Modelling phase separation in amorphous solid dispersions" @default.
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- W2951031181 doi "https://doi.org/10.1016/j.actbio.2019.06.009" @default.
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