The phase behavior of polymeric materials is understood through glass transition temperature. It is a temperature boundary above which the polymeric material is soft and viscous, and becomes hard, brittle, and glassy below this temperature. In the present work, PS/PMMA immiscible polymer blend samples are studied at different compositional ranges. Thermal transport properties of PS/PMMA polymeric blends were measured , from room temperature to 120°C. Variation in thermal conductivity ...
Author(s): K. B. Sharma, Vishal Mathur
Samples of binary reinforced composites were created by mixing varying fractions of palm fiber (20, 30, 40, and 50 weight %) in a phenoformaldehyde (PF) matrix. The thermal conductivity and thermal diffusivity were measured using Transient Plane Source equipment. The team discovered that the thermal conductivity and thermal diffusivity of the composites decreased as the amount of palm fiber increased....
Author(s): K. B. Sharma, M. S. Sreekala, N. S. Saxena, N. S. Sharma, Richa Agrawal, S. Thomas
Composites made from a combination of cis-polyisoprene (CPI) and nitrile butadiene rubber (NBR) were investigated to determine the effect of varying proportions of each additive on the mechanical and thermal properties of the final product. The use of a scanning electron microscope to quantify the structure of the material revealed that all samples were homogenous. Young's modulus and tensile strength were two of the mechanical properties studied. The blend composition ...
Author(s): K. B. Sharma, Kananbala Sharma, Mahesh Baboo, N. S. Saxena, Seema Gupta
The effective thermal conductivity and thermal diffusivity was measured for chalcogenide glass samples of the formulation Ge30-xSe70Sbx (x = 10, 15, 20, 25). It was found that both the effective thermal conductivity and thermal diffusivity were independent of temperature up to 160º C. After this point, both properties were found to increase with increasing temperature until they reached a maximum value at a point near the glass transition temperature of the glass. After reaching ...
Author(s): Anusaiya Kaswan, Dinesh Patidar, K. B. Sharma, Kananbala Sharma, N. S. Saxena, Vandana Kumari
Metal doping of a polypyrrole matrix was carried out. Nickel and Cobalt were the two metals that were used in this study, and three samples were prepared, one containing 100% Co, one containing 50% Co and 50% Ni, and finally, one containing 100% Ni. The effective thermal conductivity and thermal diffusivity were evaluated, and it was determined that metal doping of the polymer matrix resulted in increases in both the thermal conductivity, and the ...
Author(s): K. B. Sharma, Kananbala Sharma, N. S. Saxena, Rashmi Saxena, Thaneshwar P. Sharma, Vinodini Shaktawat
