The Experts below are selected from a list of 612 Experts worldwide ranked by ideXlab platform
Morteza Faghihi - One of the best experts on this subject based on the ideXlab platform.
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analysis of structure properties relationship in nitrile butadiene Rubber Phenolic resin organoclay ternary nanocomposites using simple model system
Polymers for Advanced Technologies, 2010Co-Authors: Akbar Shojaei, Morteza FaghihiAbstract:The present study deals with the structure–property relationship of organoclay (OC) filled nanocomposites based on Rubber blend comprising of nitrile-butadiene Rubber (NBR) and Phenolic resin (PH). To obtain a better insight into the characteristics of the NBR/PH/OC hybrid system, a simple model system consisting of NBR/OC nanocomposites is also taken into consideration. A series of NBR/OC and NBR/PH/OC nanocomposites containing a wide range of OC concentrations (2.5–30 phr) are prepared by using traditional open two-roll mill. Structural analysis performed by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) exhibits mixed exfoliated and intercalated morphology at low OC content, below 7.5 phr, and a well-ordered intercalated morphology at higher OC loading. It is shown that the dispersion of OC is also influenced by mixing time and order of mixing of components. Analysis of the cure characteristics, mechanical, and thermal properties of both the NBR/OC and NBR/PH/OC nanocomposites reveals that the OC is dispersed mainly in the NBR continuous phase, even though some is likely localized in the Rubber–resin interface. Copyright © 2009 John Wiley & Sons, Ltd.
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physico mechanical properties and thermal stability of thermoset nanocomposites based on styrene butadiene Rubber Phenolic resin blend
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2010Co-Authors: Akbar Shojaei, Morteza FaghihiAbstract:Abstract Effect of organoclay (OC) on the performance of styrene-butadiene Rubber (SBR)/Phenolic resin (PH) blend prepared by two-roll mill was investigated. The influence of OC content ranging between 2.5 and 30 phr on the performance of SBR/PH was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), interfacial energy analysis, tensile, dynamic mechanical, swelling, cure rheometry and thermogravimetric analysis (TGA). It was found that the OC is mainly localized in the SBR phase of SBR/PH blend through the kinetically favored mechanism relevant to Rubber chains. The results also demonstrated the positive role of PH on the dispersion of OC. Both PH and OC showed accelerating role on the cure rate of SBR and increased the crosslinking density of the Rubber phase. Additionally, the mechanical and dynamic mechanical properties of SBR were influenced by incorporation of both PH and OC. TGA showed that the OC improves thermal stability of SBR vulcanizate, while it exhibits a catalytic role in presence of PH.
Akbar Shojaei - One of the best experts on this subject based on the ideXlab platform.
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analysis of structure properties relationship in nitrile butadiene Rubber Phenolic resin organoclay ternary nanocomposites using simple model system
Polymers for Advanced Technologies, 2010Co-Authors: Akbar Shojaei, Morteza FaghihiAbstract:The present study deals with the structure–property relationship of organoclay (OC) filled nanocomposites based on Rubber blend comprising of nitrile-butadiene Rubber (NBR) and Phenolic resin (PH). To obtain a better insight into the characteristics of the NBR/PH/OC hybrid system, a simple model system consisting of NBR/OC nanocomposites is also taken into consideration. A series of NBR/OC and NBR/PH/OC nanocomposites containing a wide range of OC concentrations (2.5–30 phr) are prepared by using traditional open two-roll mill. Structural analysis performed by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) exhibits mixed exfoliated and intercalated morphology at low OC content, below 7.5 phr, and a well-ordered intercalated morphology at higher OC loading. It is shown that the dispersion of OC is also influenced by mixing time and order of mixing of components. Analysis of the cure characteristics, mechanical, and thermal properties of both the NBR/OC and NBR/PH/OC nanocomposites reveals that the OC is dispersed mainly in the NBR continuous phase, even though some is likely localized in the Rubber–resin interface. Copyright © 2009 John Wiley & Sons, Ltd.
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physico mechanical properties and thermal stability of thermoset nanocomposites based on styrene butadiene Rubber Phenolic resin blend
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2010Co-Authors: Akbar Shojaei, Morteza FaghihiAbstract:Abstract Effect of organoclay (OC) on the performance of styrene-butadiene Rubber (SBR)/Phenolic resin (PH) blend prepared by two-roll mill was investigated. The influence of OC content ranging between 2.5 and 30 phr on the performance of SBR/PH was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), interfacial energy analysis, tensile, dynamic mechanical, swelling, cure rheometry and thermogravimetric analysis (TGA). It was found that the OC is mainly localized in the SBR phase of SBR/PH blend through the kinetically favored mechanism relevant to Rubber chains. The results also demonstrated the positive role of PH on the dispersion of OC. Both PH and OC showed accelerating role on the cure rate of SBR and increased the crosslinking density of the Rubber phase. Additionally, the mechanical and dynamic mechanical properties of SBR were influenced by incorporation of both PH and OC. TGA showed that the OC improves thermal stability of SBR vulcanizate, while it exhibits a catalytic role in presence of PH.
R Ramaswamy - One of the best experts on this subject based on the ideXlab platform.
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reactive compatibilization of a nitrile Rubber Phenolic resin blend effect on adhesive and composite properties
Journal of Applied Polymer Science, 1998Co-Authors: Sasidharan P Achary, R RamaswamyAbstract:Resole Phenolic resins containing various p-cresol (PC) to phenol (P) mol ratios were prepared and characterized. These Phenolic resins were blended with nitrile Rubber (NBR) and the measurements of adhesive joint strength, stress–strain properties, DSC, TGA, DMA, TEM, and SEM were performed using a 50 : 50 NBR/Phenolic resin blend. It was observed that the adhesive joint strength and the mechanical properties of the blend enhanced significantly on incorporation of p-cresol into the Phenolic resin, and the optimum p-cresol/phenol mol ratio was in the vicinity of 2 : 1. Observation of a more continuous phase and the increase in Tg of the Rubber region in the blend indicated increased reactivity and compatibilization of NBR with Phenolic resin as p-cresol was incorporated. The effect of silica filler on the properties of the nitrile Rubber/Phenolic resin blend was also studied without and with p-cresol modification and the results suggest that silica filler take not only the role of a reinforcing filler in the nitrile–Phenolic–silica composite, but also a role as surface compatibilizer of the blend components. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1187–1201, 1998
Sasidharan P Achary - One of the best experts on this subject based on the ideXlab platform.
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reactive compatibilization of a nitrile Rubber Phenolic resin blend effect on adhesive and composite properties
Journal of Applied Polymer Science, 1998Co-Authors: Sasidharan P Achary, R RamaswamyAbstract:Resole Phenolic resins containing various p-cresol (PC) to phenol (P) mol ratios were prepared and characterized. These Phenolic resins were blended with nitrile Rubber (NBR) and the measurements of adhesive joint strength, stress–strain properties, DSC, TGA, DMA, TEM, and SEM were performed using a 50 : 50 NBR/Phenolic resin blend. It was observed that the adhesive joint strength and the mechanical properties of the blend enhanced significantly on incorporation of p-cresol into the Phenolic resin, and the optimum p-cresol/phenol mol ratio was in the vicinity of 2 : 1. Observation of a more continuous phase and the increase in Tg of the Rubber region in the blend indicated increased reactivity and compatibilization of NBR with Phenolic resin as p-cresol was incorporated. The effect of silica filler on the properties of the nitrile Rubber/Phenolic resin blend was also studied without and with p-cresol modification and the results suggest that silica filler take not only the role of a reinforcing filler in the nitrile–Phenolic–silica composite, but also a role as surface compatibilizer of the blend components. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1187–1201, 1998
Lu Jicai - One of the best experts on this subject based on the ideXlab platform.
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Rubber fastener for automobile air conditioner pipe and manufacturing method of Rubber fastener
2014Co-Authors: Lu JicaiAbstract:The invention relates to a Rubber fastener for an automobile air conditioner pipe. The Rubber fastener comprises a fastener main body and a fastening component, wherein the fastener main body consists of ethylene-propylene-diene-terpolymer Rubber, Phenolic resin, zinc oxide, stearic acid, fast extruding furnace black N550, paraffin oil, calcium carbonate, polyethylene glycol, paraffin, an aid Aflux42, an aid HMMM (Hexakis (methoxymethyl) melamine), calcium oxide, an accelerant ZDBC, an accelerant TMTD, an accelerant TDEC and sulfur; the fastening component consists of ethylene-propylene-diene-terpolymer Rubber, zinc oxide, stearic acid, fast extruding furnace black N550, super-fine calcium carbonate, paraffin oil, calcium oxide, an accelerant EZ, an accelerant CZ, an accelerant Na-22, an accelerant TMTD, an accelerant TDEDC and sulfur. Each part is moderate in hardness, very high in cold resistance, tensile strength and the like and excellent in bonding performance, the situations of cracking, facture and the like are avoided, the service life of a product is prolonged, and the cost is reduced.
