In this work, Flory-Huggins phase diagrams for correlated random copolymers with realistic chain lengths are calculated. This is achieved in two steps. At first we derive a distribution function of copolymer chains respect to composition and blockiness. Then used the method moments, which was developed by Sollich Cates [Sollich, P.; Cates, M. E.; Phys. Rev. Lett. 1998, 80, 1365-1368] polydisper...

The objective of the present investigations was to assess use thermodynamic phase diagrams and Gibbs free energy mixing, ?Gmix, for screening polymeric carriers by determining ideal drug-loading an amorphous solid dispersion formulation optimum processing temperature hot-melt extrusion a non-glass-forming drug. Mefenamic acid (MFA) used as model drug four chemically distinct polymers with close...

Polymer-modified bitumen (PMB) is a high-performance material for road construction and maintenance. But its storage stability and phase separation behaviour are still not sufficiently understood and need to be studied toward a more successful and sustainable application of PMB. In this thesis, the equilibrium thermodynamics and phase separation dynamics of PMB are investigated with the aim at ...

Abstract This research study aims to conduct a comparative performance analysis of different scaling equations and non-scaling models used for modeling asphaltene precipitation. The experimental data carry out this are taken from the published literature. Five which include Rassamadana et al., Rassamdana Sahimi, Hu Gou, Ashoori log–log were applied in two ways, i.e., on full dataset partial dat...

In article 2002006, Davide Comoretto and co-workers demonstrate a one-dimensional all-polymer photonic crystal selective to wide range of chemical species with no need for additional functionalization, promising portable sensors. Employing the perfluorinated polymer Aquivion Poly(N-vinylcarbazole) as building blocks high refractive index contrast, multi-layer film shows brilliant iridescent col...

The occurrence of gelation and the existence of mass-conserving solutions to the continuous coagulation-fragmentation equation are investigated under various assumptions on the coagulation and fragmentation rates, thereby completing the already known results. A non-uniqueness result is also established and a connection to the modified coagulation model of Flory is also made.

Abstract. The impact of molecular level surface chemistry for aerosol water-uptake and droplet growth is not well understood. In this work, spherical, nonporous, monodisperse polystyrene latex (PSL) particles treated with different functional groups are exploited to isolate the effects activation. PSL effectively water insoluble changes in particle may be considered a critical factor initial up...

Mass transfer phenomenon that occurs in the pervaporation process when applied to the microemulsion breakdown, was confirmed by the results of inverse gas chromatography. The stationary phase for this study was polydimethylsiloxane (PDMS), a hydrophobic polymer employed as a membrane in the pervaporation technique. The retention times of the different molecule probes (toluene, cyclohexane, and ...

The thermodynamic interactions in anionically synthesized poly(styrene-blockferrocenyldimethylsilane) (SF) copolymers were examined using birefringence, small angle X-ray and neutron scattering (SAXS and SANS). We show that birefringence detection of the order-disorder transition is possible in colored samples provided the wavelength of the incident beam is in the tail of the absorption spectru...

The continuous search for eco-friendly corrosion inhibitors due to differences in corrosive media remains an important point control. experimental studies on the inhibition of urea mild steel automotive gas oil (AGO) was conducted using gasometric techniques and scanning electron microscope (SEM). theoretical approach density functional theory (DFT) molecule carried out Gaussian 09 software. ad...