The Experts below are selected from a list of 20865 Experts worldwide ranked by ideXlab platform
Deba Kumar Tripathy - One of the best experts on this subject based on the ideXlab platform.
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Rheological Behavior of a Microcellular, Oil-Extended Ethylene-Propylene-Diene Rubber Compound : Effects of the Blowing Agent, Curing Agent, and Conductive Carbon Black Filler
Journal of Applied Polymer Science, 2008Co-Authors: S. P. Mahapatra, Deba Kumar TripathyAbstract:The rheological behavior of microcellular, oil-extended ethylene–propylene–diene rubber (EPDM) compounds was studied in extrusions containing a blowing Agent. The cell morphology development and rheological properties were studied for unfilled and conductive carbon black (Vulcan XC72, Cabot Corp., Ltd., Alpharetta, GA) filled compounds with variations of the blowing Agent, extrusion temperature, and shear rate. The apparent shear stress, apparent viscosity, die swell (%), and total extrusion pressure of the Vulcan XC72 filled, oil-extended EPDM compounds were determined with a Monsanto processability tester (St. Louis, MO). The effects of the Curing Agent and blowing Agent on the rheological properties of the compounds were also studied. A significant reduction in the stress and viscosity with the blowing Agent was observed in the compound in the presence of the Curing Agent in comparison with those without the Curing Agent. The viscosity reduction factor was found to be dependent on the blowing Agent loading, shear rate, and temperature. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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Rheological properties of ethylene propylene diene rubber (EPDM) compound — effect of blowing Agent, Curing Agent and carbon black filler
Polymer, 1998Co-Authors: Krishna Ch. Guriya, A. K. Bhattachariya, Deba Kumar TripathyAbstract:Abstract An experimental investigation has been carried out to study the rheological behaviour of ethylene propylene diene rubber (EPDM) compounds in extrusion containing blowing Agent. The cell morphology development and rheological properties have been studied for gum and carbon black filled systems with variation of the blowing Agent, extrusion temperature and shear rate. The apparent shear stress (τwa), apparent viscosity (ηa), die swell (%) and total extrusion pressure (ΔP) of the carbon black filled EPDM rubber compounds have been determined using the Monsanto processability tester (MPT). The effect of the Curing Agent and blowing Agent (DNPT) on the rheological properties of the compound has also been studied. There is a significant reduction in stress and viscosity with the blowing Agent in the presence of Curing Agent compared with the absence of Curing Agent. The viscosity reduction factor is found to be dependent on the blowing Agent loading, shear rate and temperature.
Krishna Ch. Guriya - One of the best experts on this subject based on the ideXlab platform.
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Rheological properties of ethylene propylene diene rubber (EPDM) compound — effect of blowing Agent, Curing Agent and carbon black filler
Polymer, 1998Co-Authors: Krishna Ch. Guriya, A. K. Bhattachariya, Deba Kumar TripathyAbstract:Abstract An experimental investigation has been carried out to study the rheological behaviour of ethylene propylene diene rubber (EPDM) compounds in extrusion containing blowing Agent. The cell morphology development and rheological properties have been studied for gum and carbon black filled systems with variation of the blowing Agent, extrusion temperature and shear rate. The apparent shear stress (τwa), apparent viscosity (ηa), die swell (%) and total extrusion pressure (ΔP) of the carbon black filled EPDM rubber compounds have been determined using the Monsanto processability tester (MPT). The effect of the Curing Agent and blowing Agent (DNPT) on the rheological properties of the compound has also been studied. There is a significant reduction in stress and viscosity with the blowing Agent in the presence of Curing Agent compared with the absence of Curing Agent. The viscosity reduction factor is found to be dependent on the blowing Agent loading, shear rate and temperature.
Lars Berglund - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of epoxy–clay nanocomposites. Influence of the nature of the Curing Agent on structure
Polymer, 2001Co-Authors: Xavier Kornmann, Henrik Lindberg, Lars BerglundAbstract:Epoxy-clay nanocomposites were synthesised by swelling an organophilic montmorillonite in a diglycidyl ether of bisphenol A resin with subsequent polymerisation. Three different Curing Agents were used: an aliphatic diamine and two cycloaliphatic diamines. The cure kinetics of these systems was evaluated by differential scanning calorimetry and the structure of the nanocomposites was characterised by X-ray diffraction and transmission electron microscopy. Successful nanocomposite synthesis was dependent not only on the cure kinetics of the epoxy system but also on the rate of diffusion of the Curing Agent into the galleries because it affects the intragallery cure kinetics. The nature of the Curing Agent influences these two phenomena substantially and therefore the resulting structure of the nanocomposite. The Curing temperature controls the balance between the extragallery reaction rate of the epoxy system and the diffusion rate of the Curing Agent into the galleries. Thus, the choice of Curing Agent and Curing conditions controls the extent of exfoliation of the clay in the material.
Lars Erglund - One of the best experts on this subject based on the ideXlab platform.
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synthesis of epoxy clay nanocomposites influence of the nature of the Curing Agent on structure
Polymer, 2001Co-Authors: Xavie Kornma, Henrik Lindberg, Lars ErglundAbstract:Epoxy-clay nanocomposites were synthesised by swelling an organophilic montmorillonite in a diglycidyl ether of bisphenol A resin with subsequent polymerisation. Three different Curing Agents were used: an aliphatic diamine and two cycloaliphatic diamines. The cure kinetics of these systems was evaluated by differential scanning calorimetry and the structure of the nanocomposites was characterised by X-ray diffraction and transmission electron microscopy. Successful nanocomposite synthesis was dependent not only on the cure kinetics of the epoxy system but also on the rate of diffusion of the Curing Agent into the galleries because it affects the intragallery cure kinetics. The nature of the Curing Agent influences these two phenomena substantially and therefore the resulting structure of the nanocomposite. The Curing temperature controls the balance between the extragallery reaction rate of the epoxy system and the diffusion rate of the Curing Agent into the galleries. Thus, the choice of Curing Agent and Curing conditions controls the extent of exfoliation of the clay in the material.
Henrik Lindberg - One of the best experts on this subject based on the ideXlab platform.
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synthesis of epoxy clay nanocomposites influence of the nature of the Curing Agent on structure
Polymer, 2001Co-Authors: Xavie Kornma, Henrik Lindberg, Lars ErglundAbstract:Epoxy-clay nanocomposites were synthesised by swelling an organophilic montmorillonite in a diglycidyl ether of bisphenol A resin with subsequent polymerisation. Three different Curing Agents were used: an aliphatic diamine and two cycloaliphatic diamines. The cure kinetics of these systems was evaluated by differential scanning calorimetry and the structure of the nanocomposites was characterised by X-ray diffraction and transmission electron microscopy. Successful nanocomposite synthesis was dependent not only on the cure kinetics of the epoxy system but also on the rate of diffusion of the Curing Agent into the galleries because it affects the intragallery cure kinetics. The nature of the Curing Agent influences these two phenomena substantially and therefore the resulting structure of the nanocomposite. The Curing temperature controls the balance between the extragallery reaction rate of the epoxy system and the diffusion rate of the Curing Agent into the galleries. Thus, the choice of Curing Agent and Curing conditions controls the extent of exfoliation of the clay in the material.
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Synthesis of epoxy–clay nanocomposites. Influence of the nature of the Curing Agent on structure
Polymer, 2001Co-Authors: Xavier Kornmann, Henrik Lindberg, Lars BerglundAbstract:Epoxy-clay nanocomposites were synthesised by swelling an organophilic montmorillonite in a diglycidyl ether of bisphenol A resin with subsequent polymerisation. Three different Curing Agents were used: an aliphatic diamine and two cycloaliphatic diamines. The cure kinetics of these systems was evaluated by differential scanning calorimetry and the structure of the nanocomposites was characterised by X-ray diffraction and transmission electron microscopy. Successful nanocomposite synthesis was dependent not only on the cure kinetics of the epoxy system but also on the rate of diffusion of the Curing Agent into the galleries because it affects the intragallery cure kinetics. The nature of the Curing Agent influences these two phenomena substantially and therefore the resulting structure of the nanocomposite. The Curing temperature controls the balance between the extragallery reaction rate of the epoxy system and the diffusion rate of the Curing Agent into the galleries. Thus, the choice of Curing Agent and Curing conditions controls the extent of exfoliation of the clay in the material.
