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B. Kuriakose - One of the best experts on this subject based on the ideXlab platform.
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Effect of bonding agents on styrene butadiene Rubber–aluminum powder composites
Journal of Applied Polymer Science, 2002Co-Authors: V. S. Vinod, Siby Varghese, B. KuriakoseAbstract:Effects of various bonding agents—such as the hexamethylene tetramine–resorcinol system (HR), bis[3- (triethoxysilyl) propyl] tetra sulfide (Si-69), and cobalt naphthenate (CoN)—on the mechanical properties of aluminum powder filled styrene butadiene Rubber composites were studied, giving emphasis on concentration of bonding agent and loading of aluminum powder. Shore A hardness, modulus, tensile strength, tear strength, heat buildup, etc., were increased by the loading of aluminum powder, and the presence of bonding agents again increased these properties. Rebound resilience and elongation at break were decreased by the addition of aluminum powder. Equilibrium swelling studies showed an improved adhesion between aluminum powder and styrene butadiene Rubber (SBR) in presence of bonding agents. Among the various bonding agents used in this study, silane coupling agent (Si-69) and hexamethylene tetramine–resorcinol (HR) system were found to be better for aluminum powder filled SBR vulcanizates. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 519–529, 2002
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Investigations on the addition of styrene butadiene Rubber in natural Rubber and dichlorocarbene modified styrene butadiene Rubber blends
Journal of Materials Science, 2002Co-Authors: M. T. Ramesan, T. K. Manoj Kumar, R. Alex, B. KuriakoseAbstract:This paper focuses on the use of styrene butadiene Rubber (SBR) as a viscosity modifier in novel blends of natural Rubber (NR) and dichlorocarbene modified styrene butadiene Rubber (DCSBR). The processing characteristics, vulcanisation kinetics, stress-strain behaviour, mechanical properties and low temperature transition of the blends have been examined in order to analyse the influence of SBR in the blends. The change in cross-link density values from stress strain behaviour and equilibrium swelling data has been correlated with the technological properties of the blends. The excellent mechanical properties and the increased cross-link density in blends in the presence of 5—10 phr of styrene butadiene Rubber reveals the viscosity modifying action of SBR in NR/DCSBR blends. The variation in viscosities of these blends with the addition of SBR is reflected in the DSC thermograms. The resulting blends show very high resistance to thermal ageing as compared to those without SBR.
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Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
International Polymer Processing, 2001Co-Authors: M. T. Ramesan, R. Alex, B. Kuriakose, P. Pradeep, Siby VargheseAbstract:Abstract The effect of dichlorocarbene modified styrene butadiene Rubber (DCSBR) as a compatibilizer in blends of acrylonitrile butadiene Rubber and styrene butadiene Rubber (SBR/NBR) has been studied. The cure characteristics, physical properties, crosslink density, FTIR studies and low temperature transitions of the blends were determined as a function of chlorine content of DCSBR. Compatibilizing efficiency depended on the chlorine content of DCSBR and composition of blend constituents. Effective compatibilization was achieved when chlorine content of compatibilizer was 25% and SBR content of blend was either 50% or lower. FTIR studies, glass transition behavior measured by DSC and DMA showed that an appreciable extent of molecular level miscibility has been achieved in SBR/NBR blends by using DCSBR as a compatibilizer. Improvement in mechanical properties such as tensile strength, tear strength, resilience, hardness and compression set were achieved both when DCSBR was added and chlorine content of DC...
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role of dichlorocarbene modified styrene butadiene Rubber in compatibilisation of styrene butadiene Rubber and chloroprene Rubber blends
European Polymer Journal, 2001Co-Authors: M. T. Ramesan, B. Kuriakose, George Mathew, R. AlexAbstract:Abstract A study was conducted on the use of dichlorocarbene modified styrene butadiene Rubber (DCSBR) for the compatibilisation of blends of styrene butadiene Rubber (SBR) and chloroprene Rubber (CR). Stress–strain behaviour, mechanical properties, and low temperature transitions of the blends were examined in order to elucidate the efficiency of the compatibiliser. It was found that effective compatibilisation was achieved when chlorine content of DCSBR was 25% and its dosage was 5 phr (parts per hundred Rubber). Thermal analysis by DSC showed that an appreciable extent of molecular level miscibility has been achieved in SBR/CR blends by using DCSBR as a compatibiliser. The formation of interfacial crosslinks in the presence of DCSBR is evident from the cure characteristics and stress–strain isotherms. An increase in tensile strength, tear strength, resilience and hardness and a decrease in compression set was observed when the chlorine content and dosage of the compatibiliser increased from 15% to 25% and 5 phr, respectively. Compatibilised blends showed enhanced mechanical properties in the presence of reinforcing fillers such as HAF carbon black and precipitated silica.
M. T. Ramesan - One of the best experts on this subject based on the ideXlab platform.
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Effect of Silica on Uncompatibilized and Compatibilized Styrene Butadiene Rubber and Nitrile Rubber Blends
International Journal of Polymeric Materials, 2011Co-Authors: M. T. RamesanAbstract:The present paper investigates the interaction of silica filler in uncompatibilized and compatibilized styrene butadiene Rubber/nitrile Rubber (SBR/NBR) blends of varying compositions. The use of a dynamic mechanical analyzer as a tool for confirming the compatibility by the addition of dichlorocarbene modified styrene butadiene Rubber (DCSBR) in these blends has been described. The addition of silica in uncompatibilized as well as compatibilized blends has been found to be increasing the rheometric-processing characteristics such as maximum viscosity and rate of cure. The magnitude of these values has been found to be higher for compatibilized blends and for 50/50 composition. The optimum cure time has been found to be decreasing with silica loading regardless of the presence of the compatibilizer. The magnitude of optimum cure time has been found to be higher for uncompatibilized system and for the composition with higher SBR content. Enhancement in mechanical properties with the addition of silica has ...
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Investigations on the addition of styrene butadiene Rubber in natural Rubber and dichlorocarbene modified styrene butadiene Rubber blends
Journal of Materials Science, 2002Co-Authors: M. T. Ramesan, T. K. Manoj Kumar, R. Alex, B. KuriakoseAbstract:This paper focuses on the use of styrene butadiene Rubber (SBR) as a viscosity modifier in novel blends of natural Rubber (NR) and dichlorocarbene modified styrene butadiene Rubber (DCSBR). The processing characteristics, vulcanisation kinetics, stress-strain behaviour, mechanical properties and low temperature transition of the blends have been examined in order to analyse the influence of SBR in the blends. The change in cross-link density values from stress strain behaviour and equilibrium swelling data has been correlated with the technological properties of the blends. The excellent mechanical properties and the increased cross-link density in blends in the presence of 5—10 phr of styrene butadiene Rubber reveals the viscosity modifying action of SBR in NR/DCSBR blends. The variation in viscosities of these blends with the addition of SBR is reflected in the DSC thermograms. The resulting blends show very high resistance to thermal ageing as compared to those without SBR.
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Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
International Polymer Processing, 2001Co-Authors: M. T. Ramesan, R. Alex, B. Kuriakose, P. Pradeep, Siby VargheseAbstract:Abstract The effect of dichlorocarbene modified styrene butadiene Rubber (DCSBR) as a compatibilizer in blends of acrylonitrile butadiene Rubber and styrene butadiene Rubber (SBR/NBR) has been studied. The cure characteristics, physical properties, crosslink density, FTIR studies and low temperature transitions of the blends were determined as a function of chlorine content of DCSBR. Compatibilizing efficiency depended on the chlorine content of DCSBR and composition of blend constituents. Effective compatibilization was achieved when chlorine content of compatibilizer was 25% and SBR content of blend was either 50% or lower. FTIR studies, glass transition behavior measured by DSC and DMA showed that an appreciable extent of molecular level miscibility has been achieved in SBR/NBR blends by using DCSBR as a compatibilizer. Improvement in mechanical properties such as tensile strength, tear strength, resilience, hardness and compression set were achieved both when DCSBR was added and chlorine content of DC...
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role of dichlorocarbene modified styrene butadiene Rubber in compatibilisation of styrene butadiene Rubber and chloroprene Rubber blends
European Polymer Journal, 2001Co-Authors: M. T. Ramesan, B. Kuriakose, George Mathew, R. AlexAbstract:Abstract A study was conducted on the use of dichlorocarbene modified styrene butadiene Rubber (DCSBR) for the compatibilisation of blends of styrene butadiene Rubber (SBR) and chloroprene Rubber (CR). Stress–strain behaviour, mechanical properties, and low temperature transitions of the blends were examined in order to elucidate the efficiency of the compatibiliser. It was found that effective compatibilisation was achieved when chlorine content of DCSBR was 25% and its dosage was 5 phr (parts per hundred Rubber). Thermal analysis by DSC showed that an appreciable extent of molecular level miscibility has been achieved in SBR/CR blends by using DCSBR as a compatibiliser. The formation of interfacial crosslinks in the presence of DCSBR is evident from the cure characteristics and stress–strain isotherms. An increase in tensile strength, tear strength, resilience and hardness and a decrease in compression set was observed when the chlorine content and dosage of the compatibiliser increased from 15% to 25% and 5 phr, respectively. Compatibilised blends showed enhanced mechanical properties in the presence of reinforcing fillers such as HAF carbon black and precipitated silica.
R. Alex - One of the best experts on this subject based on the ideXlab platform.
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Investigations on the addition of styrene butadiene Rubber in natural Rubber and dichlorocarbene modified styrene butadiene Rubber blends
Journal of Materials Science, 2002Co-Authors: M. T. Ramesan, T. K. Manoj Kumar, R. Alex, B. KuriakoseAbstract:This paper focuses on the use of styrene butadiene Rubber (SBR) as a viscosity modifier in novel blends of natural Rubber (NR) and dichlorocarbene modified styrene butadiene Rubber (DCSBR). The processing characteristics, vulcanisation kinetics, stress-strain behaviour, mechanical properties and low temperature transition of the blends have been examined in order to analyse the influence of SBR in the blends. The change in cross-link density values from stress strain behaviour and equilibrium swelling data has been correlated with the technological properties of the blends. The excellent mechanical properties and the increased cross-link density in blends in the presence of 5—10 phr of styrene butadiene Rubber reveals the viscosity modifying action of SBR in NR/DCSBR blends. The variation in viscosities of these blends with the addition of SBR is reflected in the DSC thermograms. The resulting blends show very high resistance to thermal ageing as compared to those without SBR.
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Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
International Polymer Processing, 2001Co-Authors: M. T. Ramesan, R. Alex, B. Kuriakose, P. Pradeep, Siby VargheseAbstract:Abstract The effect of dichlorocarbene modified styrene butadiene Rubber (DCSBR) as a compatibilizer in blends of acrylonitrile butadiene Rubber and styrene butadiene Rubber (SBR/NBR) has been studied. The cure characteristics, physical properties, crosslink density, FTIR studies and low temperature transitions of the blends were determined as a function of chlorine content of DCSBR. Compatibilizing efficiency depended on the chlorine content of DCSBR and composition of blend constituents. Effective compatibilization was achieved when chlorine content of compatibilizer was 25% and SBR content of blend was either 50% or lower. FTIR studies, glass transition behavior measured by DSC and DMA showed that an appreciable extent of molecular level miscibility has been achieved in SBR/NBR blends by using DCSBR as a compatibilizer. Improvement in mechanical properties such as tensile strength, tear strength, resilience, hardness and compression set were achieved both when DCSBR was added and chlorine content of DC...
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role of dichlorocarbene modified styrene butadiene Rubber in compatibilisation of styrene butadiene Rubber and chloroprene Rubber blends
European Polymer Journal, 2001Co-Authors: M. T. Ramesan, B. Kuriakose, George Mathew, R. AlexAbstract:Abstract A study was conducted on the use of dichlorocarbene modified styrene butadiene Rubber (DCSBR) for the compatibilisation of blends of styrene butadiene Rubber (SBR) and chloroprene Rubber (CR). Stress–strain behaviour, mechanical properties, and low temperature transitions of the blends were examined in order to elucidate the efficiency of the compatibiliser. It was found that effective compatibilisation was achieved when chlorine content of DCSBR was 25% and its dosage was 5 phr (parts per hundred Rubber). Thermal analysis by DSC showed that an appreciable extent of molecular level miscibility has been achieved in SBR/CR blends by using DCSBR as a compatibiliser. The formation of interfacial crosslinks in the presence of DCSBR is evident from the cure characteristics and stress–strain isotherms. An increase in tensile strength, tear strength, resilience and hardness and a decrease in compression set was observed when the chlorine content and dosage of the compatibiliser increased from 15% to 25% and 5 phr, respectively. Compatibilised blends showed enhanced mechanical properties in the presence of reinforcing fillers such as HAF carbon black and precipitated silica.
Jihua Yang - One of the best experts on this subject based on the ideXlab platform.
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Cationic cyclization of styrene–butadiene Rubber
European Polymer Journal, 2001Co-Authors: Chaoyang Wang, Xuepin Huang, Jihua YangAbstract:Controlled cyclization of Styrene-Butadiene Rubber (SBR) was achieved with the aid of cationic catalyst system based on diethylaluminium chloride (AIEt(2)Cl) and benzyl chloride (C6H5CH2Cl) and by working in xylene solution at high temperature (T > 100 degreesC). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility, free gel were obtained. The products were characterized with IR H-1-NMR, DSC, GPC. The polycyclic structure was determined. (C) 2001 Published by Elsevier Science Ltd.
A J Marzocca - One of the best experts on this subject based on the ideXlab platform.
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carbon nanotubes as reinforcement of styrene butadiene Rubber
Applied Surface Science, 2007Co-Authors: Alejandro Falco, Silvia Goyanes, G H Rubiolo, I Mondragon, A J MarzoccaAbstract:Abstract This study reports an easy technique to produce cured styrene–butadiene Rubber (SBR)/multi-walled carbon nanotubes (MWCNT) composites with a sulphur/accelerator system at 150 °C. Significant improvement in Young's modulus and tensile strength were achieved by incorporating 0.66 wt% of filler without sacrificing SBR elastomer high elongation at break. A comparison with carbon black filled SBR was also made. Field emission scanning electron microscopy was used to investigate dispersion and fracture surfaces. Results indicated that the homogeneous dispersion of MWCNT throughout SBR matrix and strong interfacial adhesion between oxidized MWCNT and the matrix are responsible for the considerable enhancement of mechanical properties of the composite.
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Carbon nanotubes as reinforcement of styrene–butadiene Rubber
Applied Surface Science, 2007Co-Authors: Alejandro Falco, Silvia Goyanes, G H Rubiolo, I Mondragon, A J MarzoccaAbstract:Abstract This study reports an easy technique to produce cured styrene–butadiene Rubber (SBR)/multi-walled carbon nanotubes (MWCNT) composites with a sulphur/accelerator system at 150 °C. Significant improvement in Young's modulus and tensile strength were achieved by incorporating 0.66 wt% of filler without sacrificing SBR elastomer high elongation at break. A comparison with carbon black filled SBR was also made. Field emission scanning electron microscopy was used to investigate dispersion and fracture surfaces. Results indicated that the homogeneous dispersion of MWCNT throughout SBR matrix and strong interfacial adhesion between oxidized MWCNT and the matrix are responsible for the considerable enhancement of mechanical properties of the composite.
