Raj Kumar Arya

Learn More
Phase separation simulation study related to cellulose acetate-water-acetone has been done. Results show that porous asymmetric and symmetric membranes can be produced by changing the nonsolvent concentration or by the drying conditions without altering the polymer content using dry-casting process. Dry-casting process is the process in which complete(More)
Global warming may cause serious problem in agricultural production, particularly in arid and semi-arid regions of the world. As the heat stress affects the seed germination, plant growth and development, resulting in drastic reduction in yield. Pearl millet is a multipurpose crop grown in these areas due to its tolerance to high temperature/drought. But,(More)
. Introduction Diffusion is usually the rate controlling step during transport in many polymer solvent systems. Fick’s law of diffusion, states that the ux of a diffusing component at a location equals the product of diffusion coefficient and its concentration gradient there. For polymer olvent systems, the diffusion coefficient is a strong function of(More)
In this work free-volume parameters needed for poly(styrene) – p-xylene-tetrahydrofuran coating and poly(methylmethacrylate) – tetrahydrofuran – ethylbenzene coatings were estimated by minimizing the difference between model predicted residual solvent and experimental residual solvent in binary coatings. Each ternary system needs two binary systems for(More)
Concentration profiles in two binary polymeric coatings poly (styrene) – p-xylene and poly (methyl methacrylate) – ethylbenzene, have been measured using confocal laser Raman spectroscopy. Measured profiles are very different from as shown earlier for rubbery coatings. Sigmoidal profiles are observed in these polymeric coatings during the course of drying(More)
  • 1