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Ning Wang - One of the best experts on this subject based on the ideXlab platform.

  • production of thermoplastic starch mmt sorbitol nanocomposites by dual melt extrusion processing
    Macromolecular Materials and Engineering, 2007
    Co-Authors: Ning Wang
    Abstract:

    A "green" processing method, dual-melt extrusion, was used to prepare thermoplastic starch/ montmorillonite nanocomposites without organic reactions in the solution. XRD demonstrates that sorbitol enlarged the interlayer distance of MMT during the first step. MMT-sorbitol, formamide and starch were used to obtain TPS/MMT nanocomposites in the second step. XRD and TEM reveal that TPS intercalated the layers of MMT. With increasing MMT content, improvements in thermal stability, tensile strength, Young's modulus and energy Break, and a slight decrease of Elongation at Break, appeared. The effect of water content on the tensile strength and Elongation at Break was also studied.

  • Production of thermoplastic starch/MMT-sorbitol nanocomposites by dual-melt extrusion processing
    Macromolecular Materials and Engineering, 2007
    Co-Authors: Xiaofei Ma, Jiugao Yu, Ning Wang
    Abstract:

    A "green" processing method, dual-melt extrusion, was used to prepare thermoplastic starch/ montmorillonite nanocomposites without organic reactions in the solution. XRD demonstrates that sorbitol enlarged the interlayer distance of MMT during the first step. MMT-sorbitol, formamide and starch were used to obtain TPS/MMT nanocomposites in the second step. XRD and TEM reveal that TPS intercalated the layers of MMT. With increasing MMT content, improvements in thermal stability, tensile strength, Young's modulus and energy Break, and a slight decrease of Elongation at Break, appeared. The effect of water content on the tensile strength and Elongation at Break was also studied.

Ivan Chodak - One of the best experts on this subject based on the ideXlab platform.

  • analysis of correlation between percolation concentration and Elongation at Break in filled electroconductive epoxy based adhesives
    European Polymer Journal, 2003
    Co-Authors: I Novak, Igor Krupa, Ivan Chodak
    Abstract:

    Abstract Electrical conductivity and Elongation at Break of epoxy filled with electroconductive carbon black, graphite or with silver-coated basalt particles or fibres were investigated in this paper. Percolation concentrations were determined to be 14 vol% for epoxy/carbon black composites, 22 vol% for epoxy/graphite composites, 28–29 vol% for both epoxy/silver-coated basalt particles and fibres. The steepest increase in electrical conductivity and the most pronounced decrease in Elongation at Break occurs at similar filler concentration range for all investigated systems. A good correlation between phenomenological model, introduced in [J. Mater. Sci. Lett. 18 (1998) 1457] and experimental data for all investigated systems was observed.

  • investigation of the correlation between electrical conductivity and Elongation at Break in polyurethane based adhesives
    Synthetic Metals, 2002
    Co-Authors: I Novak, Igor Krupa, Ivan Chodak
    Abstract:

    Electrical conductivity and Elongation at Break of polyurethane (PU) filled with two different grades of graphite, Ag-coated basalt particles and fibres were investigated in this paper. Percolation concentrations were determined to be as follows: 21 or 22 vol.% for PU/graphite composites, 29 vol.% for both PU/Ag-coated particles and PU/Ag-coated fibres composites. It was found that the steepest increase in electrical conductivity and the more pronounced decrease in Elongation at Break occurs at the same filler concentration range for all investigated systems. A good correlation between phenomenological model, introduced in [J. Mater. Sci. Lett. 18 (1999) 1457], and experimental data for all investigated systems was also observed.

Chen Xinfang - One of the best experts on this subject based on the ideXlab platform.

Hanafi Ismail - One of the best experts on this subject based on the ideXlab platform.

  • effects of epoxidized nature rubber on high density polyethylene recycled acrylonitrile butadiene rubber banana skin powder composites
    Applied Mechanics and Materials, 2015
    Co-Authors: Ragunathan Santiagoo, Hanafi Ismail, Sam Sung Ting, Azlinda Abdul Ghani, Awiezan Mislan
    Abstract:

    The compatibilizer effect of ENR-50 on the tensile properties of high density polyethylene (HDPE)/recycled acrylonitrile butadiene rubber (NBRr)/banana skin powder (BSP)/ composites has been studies. HDPE/NBRr/BSP composites were prepared by melt mixing technique using twin-screw at 180 °C for 9 minutes at rotor speed 50 rpm. The six different composites studied were 100/0/5, 80/20/5, 70/30/5, 60/40/5, 50/50/5, and 40/60/5. As for compatibilized composite a fix 5 wt% of ENR-50 was evaluated. The specimens were analysed for tensile strength and Elongation at Break (Eb). The results showed that tensile strength and the Elongation at Break were decreases with the increasing of NBRr loading. However for ENR-50 compatibilized composites, higher tensile strength and Elongation at Break was recorded. The ENR-50 was found to be an excellent compatibilizer for HDPE/NBRr/BSP composites.

  • Kenaf Powder Filled Recycled High Density Polyethylene/ Natural Rubber Biocomposites: The Effect of Filler Content
    International Journal of Integrated Engineering, 2012
    Co-Authors: Xuan Viet Cao, Azura A. Rashid, Hanafi Ismail, Tsutomu Takeichi
    Abstract:

    The performance of kenaf powder (KP) as filler for recycled high density polyethylene (rHDPE)/natural rubber (NR) thermoplastic elastomer (TPE) composites was investigated. The composites with different filler loading were prepared in a Haake internal mixer. Increasing KP loading in rHDPE/NR/KP biocomposites reduced the tensile strength, Elongation at Break but increased the stabilization torque and the tensile modulus. SEM study of fracture surface indicated that fibrillation of rHDPE was reduced and detachment of kenaf powder from polymer matrix was present particularly at high filler loading. These observations were responsible for the deterioration of tensile strength and Elongation at Break of rHDPE/NR/KP biocomposites. Water absorption study also showed that the water absorption of these biocomposites increased with increasing KP content.

  • mechanical properties and water absorption of kenaf powder filled recycled high density polyethylene natural rubber biocomposites using mape as a compatibilizer
    Bioresources, 2011
    Co-Authors: Xuan Viet Cao, Azura A. Rashid, Tsutomu Takeichi, Hanafi Ismail, Thao Vohuu
    Abstract:

    The performance of kenaf powder (KP) filled recycled high density polyethylene (rHDPE) /natural rubber (NR) blends with and without a compatibilizer, maleic anhydride grafted polyethylene (MAPE), were investigated. The composites with different filler loading (0 to 40 phr) were prepared with a Haake internal mixer. Increasing the KP loading in rHDPE/NR/KP biocomposites reduced the tensile strength and the Elongation at Break but increased the stabilization torque and the tensile modulus. The addition of MAPE as a compatibilizer increased the tensile strength, Elongation at Break, and modulus of the composites. This might be attributed to the enhanced adhesion between the filler and polymer matrix, as evidenced from the morphology, using scanning electron microscopy. The incorporation of compatibilizer also reduced the water absorption of the composites.

  • the effect of a compatibilizer on the mechanical properties and mass swell of white rice husk ash filled natural rubber linear low density polyethylene blends
    Polymer Testing, 2001
    Co-Authors: Hanafi Ismail, J M Nizam, H Abdul P S Khalil
    Abstract:

    White rice husk ash (WRHA) filled natural rubber (NR)/linear low density polyethylene (LLDPE) blends with and without a compatibilizer, poly (propylene-ethylene-acrylic acid), (PPEAA), were produced using an internal mixer. The tensile properties, hardness, and mass swell were investigated. Increasing WRHA loading in NR/LLDPE blends resulted in reduction of tensile strength, Elongation at Break and mass swell but increased tensile modulus and hardness. at a similar filler loading, the presence of PPEAA increased the tensile strength, tensile modulus, hardness, and Elongation at Break but reduced the mass swell.

  • A Comparative Study of the Effect of Thermo-Oxidative Aging on the Physical Properties of Rice Husk Ash and Commercial Fillers in Epoxidized Natural Rubber Compounds
    Journal of Elastomers and Plastics, 1997
    Co-Authors: Hanafi Ismail, A. A. Azhar, Umaru Semo Ishiaku, Z. A. Mohd Ishak
    Abstract:

    The effect of thermo-oxidative aging on physical properties viz. modulus, tensile strength, Elongation at Break, tear strength and hardness of rice husk ash (RHA) and commercial fillers in ENR compounds have been studied. While the modulus and hardness increased with aging, other properties, i.e., tensile strength, Elongation at Break and tear strength decreased. The poor retention in properties indicates that thermo-oxidative aging process has resulted in permanent damage to the vulcanizates. The hardening and brittleness of the aged vulcanizates provides clear evidence for the aging process. The comparable retention values of both white rice husk ash (WRHA), black rice husk ash (BRHA), carbon black and silica filled vulcanizates indicates that the thermo-oxidative aging behaviour is determined predominantly by the ENR matrix. Scanning electron microscopy on fracture surfaces after aging shows the filler particles were poorly wetted by the rubber matrix. This explains the dramatic reduction in tensile strength, Elongation at Break and tear strength after aging.

V B Ivanov - One of the best experts on this subject based on the ideXlab platform.

  • tga application for optimising the accelerated aging conditions and predictions of thermal aging of rubber
    Polymer Testing, 2013
    Co-Authors: Elena V Bystritskaya, Tatyana V Monakhova, V B Ivanov
    Abstract:

    Abstract Changes in the residual compression set, tensile strength and Elongation at Break, as well as the oxygen absorption and mass change, are evaluated during the thermal oxidation of butadiene-nitrile-based carbon black-filled rubber. Activation energies for the processes are determined. Using TGA, the activation energy of the first thermal degradation stage (87-88 kJ/mol) corresponded to the increase in compression set. The activation energy of the second stage (116-117 kJ/mol) corresponded to the decrease in the Elongation at Break and oxygen absorption. These correlations confirm that TGA can be used to predict the thermal stability of rubber.