Author: "Somashekarappa, H." / Topic: methylcellulose - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Somashekarappa, H."' showing total 4 results

Start Over Author "Somashekarappa, H." Topic methylcellulose

Author: Somashekarappa, H., Prakash, Y., Mahadevaiah, Demappa, T., and Somashekar, R.
Subjects: *MICROWAVES, *METHYLCELLULOSE, *POLYMER films, *POVIDONE, *MICROSTRUCTURE, *X-ray scattering, *CRYSTAL defects, *FOURIER transform infrared spectroscopy
Abstract: The changes in the microstructural parameters of microwave-irradiated hydroxy propyl methyl cellulose (HPMC) and HPMC/PVP (poly(vinylpyrrolidone)) blend films have been studied using the Wide Angle X-Ray Scattering Technique (WAXS) method. The crystal imperfection parameters, such as lattice strain (g%), the average number of unit cells ⟨N⟩ counted in a direction perpendicular to Bragg's plane (hkl), spacing of (hklplanesdhkl, crystallite size ⟨Ds⟩, distortion width, standard deviation, stacking faults, twin faults, were computed by the whole pattern fitting method. The obtained results were quantified in terms of the radiation dosage given to the samples. X-ray analysis reveals that there is a decrease in the crystallite size with the increase in the radiation dosage. Fourier transform Infra-Red (FTIR) analysis has been also carried out for both the unirradiated and irradiated films to study the effect of microwave radiation on HPMC and HPMC/PVP polymer blend films. The scanning electron microscope study is also carried out to know the surface morphology of these blend films. [ABSTRACT FROM AUTHOR]
Published: 2013
Full Text: View/download PDF

Author: Somashekarappa, H., Prakash, Y., Krishne Urs, R. Gopal, and Somashekar, R.
Subjects: *CRYSTAL structure, *IRON chlorides, *POLYMER blends, *DOPED semiconductors, *METHYLCELLULOSE, *POLYELECTROLYTES, *POVIDONE, *ELECTRIC properties of metals
Abstract: Solid polymer electrolyte (SPE) based on Hydroxypropylemethylcellulose (HPMC) and Polyvinylpyrrolidone (PVP) polymer blend films complexed with different weight ratio of FeCl3 were prepared using solution casting method and investigated using X-ray line profile analysis. Here an attempt has been made to study the changes in crystal imperfection parameters in HPMC/PVP blend films with the increase in concentration of FeCl3. The obtained results shows that decrease in micro crystalline parameters results in increase in the amorphous nature of the film yields more flexibility, biodegradability and good ionic conductivity. AC conductivity measurements in these films show that the conductivity increases as the concentration of FeCl3 increases. These films were suitable for electro chemical applications. [ABSTRACT FROM AUTHOR]
Published: 2015
Full Text: View/download PDF

Author: Prakash, Y., Somashekarappa, H., Mahadevaiah, and Somashekar, R.
Subjects: *POLYMER films, *PLASTIC analysis (Engineering), *SORBITOL, *MECHANICAL behavior of materials, *METHYLCELLULOSE, *STRENGTH of materials, *MICROSTRUCTURE
Abstract: A correlation study on physical and mechanical properties of Hydroxy propyl-methylcellulose (HPMC) polymer films plasticized with different weight ratio of Sorbitol, prepared using solution casting method, was carried out using wide angle X-ray technique and universal testing machine. It is found that the crystallanity decreases as the concentration of Sorbitol increases up to a certain concentration and there afterwards increases. Measured Physical Properties like tensile strength decreases and elongation (%) increases indicating increase in the flexibility of the films. These observations confirm the correlation between microstructal parameters and mechanical properties of films. These films are suitable for packaging food products. [ABSTRACT FROM AUTHOR]
Published: 2013
Full Text: View/download PDF

Author: Somashekarappa, H., Prakash, Y., Mahadevaiah, Hemalatha, K., and Somashekar, R.
Subjects: *MICROSTRUCTURE, *COBALT chloride, *DOPING agents (Chemistry), *METHYLCELLULOSE, *POVIDONE, *POLYELECTROLYTES, *IONIC conductivity
Abstract: Solid polymer electrolyte (SPE) based on Hydroxypropylemethylcellulose (HPMC) and Polyvinylpyrrolidone (PVP) polymer blend films complexed with different weight ratio of CoCl2 were prepared using solution casting method and investigated using X-ray line profile analysis. An attempt has been made to study the changes in crystal imperfection parameters in HPMC/PVP blend films with the increase in concentration of CoCl2. Results show that decrease in micro crystalline parameter values is accompanied with increase in the amorphous content in the film which is the reason for film to have more flexibility, biodegradability and good ionic conductivity. AC conductivity measurements in these films show that the conductivity increases as the concentration of CoCl2 increases. These films were suitable for electro chemical applications. [ABSTRACT FROM AUTHOR]
Published: 2013
Full Text: View/download PDF

Books, media, physical & digital resources

Searchworks