Research Interests: Engineering, Materials Engineering, Chemical Engineering, Analytical Chemistry, Mass Transfer, and 13 moreMembrane Science, Polymer, Differential scanning calorimetry, Propionic Acid, Polypropylene, Hydrogen Bond, CHEMICAL SCIENCES, Glass Transition Temperature, Polyethylene Glycol, Dynamic Mechanical Thermal Analysis (DMTA), Molecular weight, Melting Temperature, and Fourier transform infrared
Research Interests:
... Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon ... laminated textiles with shape memory polyurethanes, the coated/laminated textiles should have ... temperature and body temperature which... more
... Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon ... laminated textiles with shape memory polyurethanes, the coated/laminated textiles should have ... temperature and body temperature which derives the development of smart garments. ...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
... Access Statistics: 1 Abstract Views - Detailed Statistics. Created: Tue, 02 Mar 2010, 08:40:25 EST by Jon Swabey on behalf of Aust Institute for Bioengineering & Nanotechnology - Detailed History. The University of Queensland. ...
Sandip K. Chakrabarti2,1, S. Pal1, S. Sasmal2, SK Mondal2, S. Ray2, and T. Basak1 1 SN Bose National Centre for Basic Sciences, Block-JD, Sector-II, Salt Lake, Kolkata-700098, India, chakraba@bose.res.in, sujay@bose.res.in,... more
Sandip K. Chakrabarti2,1, S. Pal1, S. Sasmal2, SK Mondal2, S. Ray2, and T. Basak1 1 SN Bose National Centre for Basic Sciences, Block-JD, Sector-II, Salt Lake, Kolkata-700098, India, chakraba@bose.res.in, sujay@bose.res.in, tamalbasak@bose.res.in 2 Indian Centre for ...
Research Interests:
Research Interests:
Research Interests:
An attempt has been made to investigate the thermal degradation of thermoplastic segmented polyurethane (TSPU) as a function of hard segment (HS) content. TSPU, and its corresponding hard segment and soft segment, has been studied in air... more
An attempt has been made to investigate the thermal degradation of thermoplastic segmented polyurethane (TSPU) as a function of hard segment (HS) content. TSPU, and its corresponding hard segment and soft segment, has been studied in air and nitrogen. Comparing the results of solid conversion of polyurethane in different conditions (air and nitrogen), significant differences were observed. Derivative thermogrametry (DTG)
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide-block-ethylene glycol methacrylate) were grafted from commercial polyamide thin-film composite nanofiltration membranes using surface-initiated atom transfer radical... more
Poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide-block-ethylene glycol methacrylate) were grafted from commercial polyamide thin-film composite nanofiltration membranes using surface-initiated atom transfer radical polymerization. The results from Fourier-transform infrared spectroscopy confirmed the successful grafting of both polymers from the membrane surfaces. Contact angle measurements were done to illustrate the temperature responsive wettability of the modified membrane surfaces. Modified membranes were used in flux measurements
Research Interests:
An attempt has been made to investigate the influence of film casting temperature and thermal ageing on order structure formation of segmented polyurethane (SPU) block copolymer. For this purpose films were casted at three different... more
An attempt has been made to investigate the influence of film casting temperature and thermal ageing on order structure formation of segmented polyurethane (SPU) block copolymer. For this purpose films were casted at three different temperature of 60, 80, or 100°C and thermal aged at 100, 120, 130, or 150°C. The structure of films were investigated by Fourier-transform infrared (FT-IR),
Research Interests:
Research Interests:
Research Interests:
... Soft segment crystal melting enhances the water vapor transport properties of the dense membrane. At soft segment crystal melting temperature, the water vapor transport properties of the sample with 0.25 wt% of ... 4. B. Safadi, R.... more
... Soft segment crystal melting enhances the water vapor transport properties of the dense membrane. At soft segment crystal melting temperature, the water vapor transport properties of the sample with 0.25 wt% of ... 4. B. Safadi, R. Andrews, and EA Grulke, J. Appl. Polym. ...
Research Interests:
... SPUs are characterized by segmented structure (block copolymer), and the morphology depends on chemical ... of free volume holes available in polymer controls the rate of gas diffusion and ... The DSC and WAXD of four polyurethane... more
... SPUs are characterized by segmented structure (block copolymer), and the morphology depends on chemical ... of free volume holes available in polymer controls the rate of gas diffusion and ... The DSC and WAXD of four polyurethane samples used in the present study have been ...
Research Interests:
Polyurethane/multiwalled carbon nanotube (MWNT) composite membranes with thermal sensitive shape memory and mass transfer properties were synthesized via in situ pre-polymerization from concentration pretreated MWNT in DMF... more
Polyurethane/multiwalled carbon nanotube (MWNT) composite membranes with thermal sensitive shape memory and mass transfer properties were synthesized via in situ pre-polymerization from concentration pretreated MWNT in DMF (N,N-dimethylformamide). Composite membranes were made from these polyurethane/MWNT solutions by casting them into Teflon plates. SEM photographs demonstrated that the MWNT distributed relatively homogenously in polyurethane matrix at low content and preferred to
Research Interests:
Thermomechanical and shape memory behavior on thermo plastic segmented polyurethane (SPU) copolymers based on polytetramethylene glycol (number average molecular weight, Mn = 2900 g mol 1), 1,4-butane diol, 4,4′-diphenylmethane... more
Thermomechanical and shape memory behavior on thermo plastic segmented polyurethane (SPU) copolymers based on polytetramethylene glycol (number average molecular weight, Mn = 2900 g mol 1), 1,4-butane diol, 4,4′-diphenylmethane diisocyanate (MDI), and with/without polyethylene glycol (PEG) (number average molecular weight, Mn = 3400 g mol-1) were studied. SPU with 5 wt% of PEG 3400 showed the highest tensile storage modulus
Research Interests:
The thermal degradation of polytetramethylene glycol (PTMG, Mn 1/42900) based polyurethane (PU), along with four different weight contents (such as 0.25, 0.50, 1.0, and 2.5 wt%) of functionalized multiwalled nanotube (MWNT) reinforced PUs... more
The thermal degradation of polytetramethylene glycol (PTMG, Mn 1/42900) based polyurethane (PU), along with four different weight contents (such as 0.25, 0.50, 1.0, and 2.5 wt%) of functionalized multiwalled nanotube (MWNT) reinforced PUs are studied in air as well as in nitrogen atmosphere. The degradation results are reported in 10 and 50% weight loss and derivative of thermogravimetry (DTG). As
Research Interests:
... The increase of water vapor permeability is sharp from 18 to 25°C, due to the soft segment crystal melting (2023°C), which enhances the permeability. ... 10 Safadi, B.; Andrews, R.; Grulke, EA J Appl Polym Sci 2002, 84, 2660. ...
Research Interests:
Research Interests:
We report the results of our monitoring of the NWC transmitter from Khukurdaha (� 80 km away from Kolkata) during the partial solar eclipse (75%) of 15th January, 2010. The receiving station and the transmitter were on two opposite sides... more
We report the results of our monitoring of the NWC transmitter from Khukurdaha (� 80 km away from Kolkata) during the partial solar eclipse (75%) of 15th January, 2010. The receiving station and the transmitter were on two opposite sides of the annular eclipse belt. We got clear depression in the data during the period of partial eclipse. However, most
Research Interests:
... 43 Chalantika, Garia Station Road, Kolkata-700083, India, sudipta@csp.res.in, sushanta@csp. res.in, suman@csp.res.in, surya@csp.res ... The authors are thankful to many team members of the campaign, namely, AK Choudhury, K. Giri, B.... more
... 43 Chalantika, Garia Station Road, Kolkata-700083, India, sudipta@csp.res.in, sushanta@csp. res.in, suman@csp.res.in, surya@csp.res ... The authors are thankful to many team members of the campaign, namely, AK Choudhury, K. Giri, B. Khadka, N. Iqbal for helping procuring ...
Polyurethane (PU) foams were prepared using a palm oil-based polyol (PO-p). At the first stage, palm oil was converted to monoglycerides as a new type of polyol by glycerolysis. A yield of the product reached 70% at reaction temperature... more
Polyurethane (PU) foams were prepared using a palm oil-based polyol (PO-p). At the first stage, palm oil was converted to monoglycerides as a new type of polyol by glycerolysis. A yield of the product reached 70% at reaction temperature of 90 degrees C by using an alkali catalyst and a solvent. At the second stage, PU foams were prepared from mixtures of the polyol and polyethylene glycol (PEG) or diethylene glycol (DEG) and an isocyanate compound. Characterization of the foams was carried out by thermal and mechanical analyses. The analyses showed that the chain motion of polyurethane becomes more flexible at the higher PO-p content in the whole polymer, which indicates that the monoglyceride molecules work as soft segments. The study here may lead to a development of a new type of polyurethane foams using palm oil as a raw material.