Mahesh Baboo - Academia.edu (original) (raw)

Papers by Mahesh Baboo

Phase Transitions, 2017

Blends of cis-polyisoprene (CPI) and chloroprene rubber (CR) have been prepared in different blen... more Blends of cis-polyisoprene (CPI) and chloroprene rubber (CR) have been prepared in different blend compositions by solution casting. Structural characterization of these blends has been done using X-ray diffraction and scanning electron microscopy. The experimental values of thermomechanical properties, mechanical properties and thermal conductivity of so-prepared blends determined using dynamic mechanical analyzer and thermal constant analyzer have been presented. Crosslink density has been determined using different models. Experimental results from thermo-mechanical properties show that all the blends are immiscible. Tensile strength, toughness, Young's modulus and thermal conductivity of these blends were found to be higher than that of pure CPI and pure CR. However, mechanical properties of 25/75(V/V) of CPI/CR blend and thermal conductivity of 75/25(V/V) of CPI/CR blend have been found to be highest.

Advanced Science Letters, 2016

Polymer Bulletin, 2015

Blends of cis-polyisoprene (CPI) and nitrile butadiene rubber (NBR) in different volume ratio wer... more Blends of cis-polyisoprene (CPI) and nitrile butadiene rubber (NBR) in different volume ratio were prepared to see the effect of composition on different properties. Structure characterization has been done through X-ray diffraction and scanning electron microscope. Scanning electron micrographs confirm homogeneous nature of all the blends. The dynamic mechanical analyzer was used to measure damping, storage modulus, glass transition temperature and mechanical properties (Young’s modulus and tensile strength) of these blends. Activation energy and fragility were determined for the non-Arrhenius (fragile) behavior of viscosity using Vogel–Fulchuer–Tammann (VFT) equation. Thermal conductivity has been analyzed through thermal constant analyzer. Results indicate that all the measured properties are dependent on blend composition and crosslink density.

Advanced Electrochemistry, 2014

Polymer Engineering & Science, 2012

In the present article, the effect of c-ray irradiation of doses 14.85, 30, and 45 kGy on the the... more In the present article, the effect of c-ray irradiation of doses 14.85, 30, and 45 kGy on the thermomechanical and tensile properties of blends of cis-polyisoprene and trans-polyisoprene have been investigated. The results on thermomechanical properties show that glass transition temperature increases and height of tan d of material decreases with increasing radiation dose. Tensile measurements reveal that all the tensile properties like tensile strength, Young's modulus, and toughness also show an increasing trend with increasing dose of radiation. This increasing behavior of both thermomechanical and tensile properties has been explained through crystallinity and crosslink density induced by radiation.

Frontiers of Optoelectronics in China, 2010

A systematic study has been made on the behavior of Al/n-CdS thin film junction on flexible polym... more A systematic study has been made on the behavior of Al/n-CdS thin film junction on flexible polymer substrate (polyethylene terephthalate, PET) grown using thermal evaporation method. Temperature dependence of I-V measurements for this junction has been done which closely follow the equations of Schottky barrier junction dominated by thermionic emission mechanism. Intrinsic and contact properties such as barrier height, ideality factor and series resistance have been calculated from I-V characteristics. The barrier height of Al/n-CdS junction is found to increase with increase in temperature whereas ideality factor and series resistance decrease with increase in temperature.

Chalcogenide materials such as CdS∕ ZnS have been coated on polyethylene terephthalate (PET) film... more Chalcogenide materials such as CdS∕ ZnS have been coated on polyethylene terephthalate (PET) films using vacuum thermal evaporation method. Commercial PET film of thickness 20 μm has been used as flexible substrate. The structure of PET and coated ...

The present paper reports the investigations on miscibility and thermophysical properties of blen... more The present paper reports the investigations on miscibility and thermophysical properties of blend of Poly methyl methacrylate with Polyvinylchloride, prepared by solution casting method. The miscibility of the samples is examined by dynamic mechanical analyzer ( ...

AIP Conference Proceedings, 2014

Measurements of mechanical and thermal transport properties have been carried out on the samples ... more Measurements of mechanical and thermal transport properties have been carried out on the samples of polyisoprene (Cis and Trans) blends prepared by solution casting, in the temperature range from 173K to 273K using Dynamic Mechanical Analyzer and Transient Plane Source Technique, respectively. Results show that a sudden change is observed in the values of tan δ, storage modulus (G), thermal conductivity (λ) and heat capacity per unit volume (ρcp) at the glass transition temperature. Also the values of G, λ and ρcp have been observed higher for all the three blends as compared to their pure components. The variation of all these properties has been explained on the basis of crystallinity and crosslink density.

Thick and thin films of trans‐polyisoprene (TPI) have been prepared using solution casting method... more Thick and thin films of trans‐polyisoprene (TPI) have been prepared using solution casting method by dissolving TPI in toluene. Thick films of TPI have been used to determine thermal transport properties at different temperatures through Thermal Constant Analyzer (TCA). ...

Thermochimica Acta, 2010

In this study, elastomeric blends of trans-polyisoprene and liquid cis-polyisprene have been prep... more In this study, elastomeric blends of trans-polyisoprene and liquid cis-polyisprene have been prepared by solution casting. Wide angle X-ray scattering (WAXS) measurements have been performed in order to determine crystallinity. The dynamic mechanical analyzer (DMA) technique has been used to obtain the storage modulus and glass transition temperature of the blends. The apparent activation energy of the glass transition temperature has also been determined using Vogel-Fulcher-Tammann (VFT) equation. Results indicate that crystallinity, storage modulus and apparent activation energy decrease with decreasing trans-polyisoprene content while glass transition temperatures show opposite behavior.

Polymer-Plastics Technology and Engineering, 2009

... Sandhya Gupta, Manasvi Dixit, Mahesh Baboo, Kananbala Sharma, and NS Saxena Semiconductor and... more ... Sandhya Gupta, Manasvi Dixit, Mahesh Baboo, Kananbala Sharma, and NS Saxena Semiconductor and Polymer Science Laboratory, Department of Physics ... Author would also like to thank Ms. Deepika, Mrs. Rashmi Saxena, and Dr. Dinesh Patidar, Mr. KS Rathore, Mr. Vishal ...

Polymer Bulletin, 2010

Measurements of mechanical and thermal transport properties have been made on the blends of cis-p... more Measurements of mechanical and thermal transport properties have been made on the blends of cis-polyisoprene (CPI) and trans-polyisoprene (TPI) prepared by a solution casting method. Characterization of these blends has been done using wide angle X-ray scattering. Thermo-mechanical, mechanical, and thermal transport properties have been determined employing dynamic mechanical analyzer (DMA) and transient plane source. Storage modulus and tan δ as

Phase Transitions, 2009

... Acknowledgements One of the authors (Manasvi Dixit) is thankful to UGC and BRNS for providing... more ... Acknowledgements One of the authors (Manasvi Dixit) is thankful to UGC and BRNS for providing financial assistance during this work. Authors would also like to thank MsDeepika for her help in various ways during the course of this work. ...

Phase Transitions, 2011

... One of the authors Mahesh Baboo is also thankful to Ms Deepika and Ms Sonalika Agrawal for te... more ... One of the authors Mahesh Baboo is also thankful to Ms Deepika and Ms Sonalika Agrawal for technical suggestions. References. 1. M. Baboo, M. Dixit, K. Sharma, and NS Saxena, Effect of Temperature on Thermal Transport and Mechanical Properties of Trans-polyisoprene ...

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2011

The cellulose/iron oxide films were synthesized by a simple solution mixing-curing method. The st... more The cellulose/iron oxide films were synthesized by a simple solution mixing-curing method. The structural elucidation of these films was made, using Fourier transform infrared spectroscopy (FTIR) and X-ray diffractions (XRD). The homogeneous dispersion of iron oxide in nanocomposites and morphology of their films were analyzed by Scanning Electron Microscopy (SEM). Thermal stability was conducted with the help of Thermogravimetric Analyzer (TGA). The improved Integral Procedural Decomposition Temperature (IPDT) value confirms that cellulose/iron oxide is more thermally stable than cellulose film. The tensile stress test was conducted to analyze the mechanical properties of cellulose, cellulose/(0.5 wt%)Fe 3 O 4 , cellulose/(1 wt%)Fe 3 O 4 and cellulose/(2 wt%)Fe 3 O 4 nanocomposites films. The tensile strength and Young modulus of the cellulose/ (1 wt%)Fe 3 O 4 nanocomposites films were observed as 9.42 ± 0.6% and 45.16 ± 0.4% higher than that of the cellulose film, respectively. The physico-mechanical properties of these films suggest that the iron oxide based cellulose nanocomposite films may have a potential scope for their application in packaging industries.

Journal of Polymer Engineering, 2011

This paper focuses on the comparative evaluation of the glass transition temperature (Tg), storag... more This paper focuses on the comparative evaluation of the glass transition temperature (Tg), storage modulus and thermal conductivity of trans-polyisoprene (TPI) and CdS-TPI nanocomposite. The CdS nanoparticles synthesized by chemical route are dispersed into TPI using ultrasonic vibrations. Particle size of nanocrystals is obtained from X-ray diffraction and found to be 1.84 nm. Thermo-mechanical properties (Tg and storage modulus) are measured by dynamic mechanical analyzer (DMA), while thermal conductivity is a measured using the transient plane source (TPS) technique. It is observed that glass transition temperature and thermal conductivity are higher while storage modulus and mechanical properties are lower for CdS-TPI nanocomposites than for pure TPI. This has been explained on the basis of structural changes occurring due to introduction of CdS as filler into the TPI.

International Journal of Polymeric Materials, 2010

Page 1. Effect of 50 MeV Li þ3 Ion Beam Irradiation on Thermomechanical Properties of PMMA/PC Ble... more Page 1. Effect of 50 MeV Li þ3 Ion Beam Irradiation on Thermomechanical Properties of PMMA/PC Blend Films Manasvi Dixit,1 Deepika,1 Mahesh Baboo,1 Kananbala Sharma,1 NS Saxena,1 DK Avasthi,2 and Pawan K. Kulriya2 ...