Molecular simulation study on sorption and diffusion processes in polymeric pervaporation membrane materials

a study on rate making and required reserves determination in reinsurance market: a simulation

reinsurance is widely recognized as an important instrument in the capital management of an insurance company as well as its risk management tool. this thesis is intended to determine premium rates for different types of reinsurance policies. also, given the fact that the reinsurance coverage of every company depends upon its reserves, so different types of reserves and the method of their calc...

Effects of Aluminum Incorporation in Tobermorite Structure on Chloride Diffusion: A Molecular Dynamics Simulation Study

In this paper, the effects of different aluminum to silicon ratios in silicate chains of calcium silicate hydrates (C-S-H) are evaluated on the diffusion coefficient of chloride ions by molecular dynamics method. Tobermorite is a crystalline phase that is used for studying C-S-H properties in nano scale, because of its analogous chemical composition to C-S-H. Aluminum incorporation in C-S-H and...

SBA-16 Materials: Synthesis, Diffusion and Sorption

Preferential Sorption versus Preferential Permeability in Pervaporation*

Transport of liquids by pervaporation takes place by a solution-diffusion mechanism. In order to investigate the “solution part” of this transport model, preferential sorption has been compared with preferential permeability. Sorption equilibria and pervaporation experiments for the systems water-ethanol-cellulose acetate, water-ethanol-polyacrylonitrile and water-ethanol-polysulfone have been ...

Molecular diffusion in polymeric systems

Molecular diffusion of polymer chains and low molecular weight constituents and impurities can be an important process in the formation and application of polymer composites. Molecular diffusion in polymer systems is a complex process which can be a strong function of temperature, concentration, polymer molecular weight and polymer morphology. During the last decade, significant advances have b...