The Experts below are selected from a list of 213 Experts worldwide ranked by ideXlab platform

A. Moet - One of the best experts on this subject based on the ideXlab platform.

  • Reduction of residual stress in montmorillonite/Epoxy Compounds
    Journal of Materials Science, 1994
    Co-Authors: P. Kelly, A. Akelah, S. Qutubuddin, A. Moet
    Abstract:

    An Epoxy resin was cured while in intimate contact with small amounts of Epoxyphilic montmorillonites. It was determined that cured Epoxy exists within the montmorillonite interlayer by the observation of very high interlayer spacings, even greater than 8 nm, Generally, Epoxy Compounds containing montmorillonites that had been swollen in the curing agent prior to curing exhibited larger interlayer spacings, especially among the non-dispersed montmorillonite layers. The maximum observed residual stress was reduced by greater than 50% in the Epoxyphilic montmorillonite/Epoxy Compounds over that of the pure Epoxy. The Epoxyphilic montmorillonite/Epoxy Compounds generally exhibited higher values of glass transition temperature, flexural modulus, and ultimate flexural strength than the pure Epoxy. The tyramine-montmorillonite Compounds typically had the highest values overall.

  • reduction of residual stress in montmorillonite Epoxy Compounds
    Journal of Materials Science, 1994
    Co-Authors: P. Kelly, A. Akelah, S. Qutubuddin, A. Moet
    Abstract:

    An Epoxy resin was cured while in intimate contact with small amounts of Epoxyphilic montmorillonites. It was determined that cured Epoxy exists within the montmorillonite interlayer by the observation of very high interlayer spacings, even greater than 8 nm, Generally, Epoxy Compounds containing montmorillonites that had been swollen in the curing agent prior to curing exhibited larger interlayer spacings, especially among the non-dispersed montmorillonite layers. The maximum observed residual stress was reduced by greater than 50% in the Epoxyphilic montmorillonite/Epoxy Compounds over that of the pure Epoxy. The Epoxyphilic montmorillonite/Epoxy Compounds generally exhibited higher values of glass transition temperature, flexural modulus, and ultimate flexural strength than the pure Epoxy. The tyramine-montmorillonite Compounds typically had the highest values overall.

Herman Terryn - One of the best experts on this subject based on the ideXlab platform.

  • influence of the iron oxide acid base properties on the chemisorption of model Epoxy Compounds studied by xps
    Journal of Physical Chemistry C, 2007
    Co-Authors: Jan Wielant, Tom Hauffman, Orlin Blajiev, René Hausbrand, Herman Terryn
    Abstract:

    In this work, the influence of the iron oxide acid−base properties on the adsorption of model Epoxy Compounds was examined. To study this, iron oxide layers with a different surface hydroxyl fractions were prepared in controllable and reproducible conditions. The surfaces were characterized by X-ray photoelectron spectroscopy (XPS). An expression for the hydroxyl fraction of the oxide films was deduced, starting from the measured XPS intensities. Two model Epoxy Compounds characteristic of an Epoxy/amide system were adsorbed on the oxides:  N,N‘-dimethylsuccinamide and N-methyldiethanolamine. Additionally, an amine molecule without alcohol groups, N,N‘-diethylmethylamine, was adsorbed to investigate the role of alcohol functionalities on the amine adsorption mechanism. The interaction between the oxide layers and the nitrogenous model Compounds were studied by examination of the O 1s and N 1s XPS photopeaks. The data showed that the amine and amide nitrogen adsorbed via two different bonding modes:  via L...

  • Influence of the Iron Oxide Acid−Base Properties on the Chemisorption of Model Epoxy Compounds Studied by XPS
    The Journal of Physical Chemistry C, 2007
    Co-Authors: Jan Wielant, Tom Hauffman, Orlin Blajiev, René Hausbrand, Herman Terryn
    Abstract:

    In this work, the influence of the iron oxide acid−base properties on the adsorption of model Epoxy Compounds was examined. To study this, iron oxide layers with a different surface hydroxyl fractions were prepared in controllable and reproducible conditions. The surfaces were characterized by X-ray photoelectron spectroscopy (XPS). An expression for the hydroxyl fraction of the oxide films was deduced, starting from the measured XPS intensities. Two model Epoxy Compounds characteristic of an Epoxy/amide system were adsorbed on the oxides:  N,N‘-dimethylsuccinamide and N-methyldiethanolamine. Additionally, an amine molecule without alcohol groups, N,N‘-diethylmethylamine, was adsorbed to investigate the role of alcohol functionalities on the amine adsorption mechanism. The interaction between the oxide layers and the nitrogenous model Compounds were studied by examination of the O 1s and N 1s XPS photopeaks. The data showed that the amine and amide nitrogen adsorbed via two different bonding modes:  via L...

P. Kelly - One of the best experts on this subject based on the ideXlab platform.

  • Reduction of residual stress in montmorillonite/Epoxy Compounds
    Journal of Materials Science, 1994
    Co-Authors: P. Kelly, A. Akelah, S. Qutubuddin, A. Moet
    Abstract:

    An Epoxy resin was cured while in intimate contact with small amounts of Epoxyphilic montmorillonites. It was determined that cured Epoxy exists within the montmorillonite interlayer by the observation of very high interlayer spacings, even greater than 8 nm, Generally, Epoxy Compounds containing montmorillonites that had been swollen in the curing agent prior to curing exhibited larger interlayer spacings, especially among the non-dispersed montmorillonite layers. The maximum observed residual stress was reduced by greater than 50% in the Epoxyphilic montmorillonite/Epoxy Compounds over that of the pure Epoxy. The Epoxyphilic montmorillonite/Epoxy Compounds generally exhibited higher values of glass transition temperature, flexural modulus, and ultimate flexural strength than the pure Epoxy. The tyramine-montmorillonite Compounds typically had the highest values overall.

  • reduction of residual stress in montmorillonite Epoxy Compounds
    Journal of Materials Science, 1994
    Co-Authors: P. Kelly, A. Akelah, S. Qutubuddin, A. Moet
    Abstract:

    An Epoxy resin was cured while in intimate contact with small amounts of Epoxyphilic montmorillonites. It was determined that cured Epoxy exists within the montmorillonite interlayer by the observation of very high interlayer spacings, even greater than 8 nm, Generally, Epoxy Compounds containing montmorillonites that had been swollen in the curing agent prior to curing exhibited larger interlayer spacings, especially among the non-dispersed montmorillonite layers. The maximum observed residual stress was reduced by greater than 50% in the Epoxyphilic montmorillonite/Epoxy Compounds over that of the pure Epoxy. The Epoxyphilic montmorillonite/Epoxy Compounds generally exhibited higher values of glass transition temperature, flexural modulus, and ultimate flexural strength than the pure Epoxy. The tyramine-montmorillonite Compounds typically had the highest values overall.

Yie Shun Chiu - One of the best experts on this subject based on the ideXlab platform.

  • using diethylphosphites as thermally latent curing agents for Epoxy Compounds
    Journal of Polymer Science Part A, 2003
    Co-Authors: Yie Shun Chiu, Yingling Liu, Wenlung Wei, Wenyu Chen
    Abstract:

    Diethylphosphite (DEP) and its derivative exhibited thermally latent properties for Epoxy curing reactions through the formation of phosphonic acid as an active species from a reaction of ethanol elimination, which was observed with 1 H NMR and pyrolysis gas chromatography/mass spectrometry measurements. The thermally latent properties and curing reaction kinetics of the curing reaction of DEPs with diglycidyl ether of bisphenol A were studied with differential scanning calorimetry. The cured Epoxy resins possessed a phosphorous element coming from the DEP derivatives, exhibiting improved flame retardancy.

  • Epoxy resins possessing flame retardant elements from silicon incorporated Epoxy Compounds cured with phosphorus or nitrogen containing curing agents
    Polymer, 2002
    Co-Authors: Yingling Liu, Yie Shun Chiu
    Abstract:

    Abstract New silicon-containing Epoxy Compounds were obtained by reacting a bisphenol-A type Epoxy and an o -cresol–formaldehyde novolac type Epoxy with diphenylsilandiol and triphenylsilanol, respectively. The reactions were performed with tin(II) chloride as a catalyst at 140–170 °C. With various feeding ratios of reactants, the Epoxy Compounds contained various silicon contents. The thermal stability and the flame retardant property of the cured Epoxy resins were improved with this incorporation of silicon. Synergistic effects of phosphorus/silicon and nitrogen/silicon on enhancing limited oxygen index values were also observed for the Epoxy resins from the silicon-containing Epoxy Compounds cured with phosphorus- and melamine-containing agents.

Jan Wielant - One of the best experts on this subject based on the ideXlab platform.

  • influence of the iron oxide acid base properties on the chemisorption of model Epoxy Compounds studied by xps
    Journal of Physical Chemistry C, 2007
    Co-Authors: Jan Wielant, Tom Hauffman, Orlin Blajiev, René Hausbrand, Herman Terryn
    Abstract:

    In this work, the influence of the iron oxide acid−base properties on the adsorption of model Epoxy Compounds was examined. To study this, iron oxide layers with a different surface hydroxyl fractions were prepared in controllable and reproducible conditions. The surfaces were characterized by X-ray photoelectron spectroscopy (XPS). An expression for the hydroxyl fraction of the oxide films was deduced, starting from the measured XPS intensities. Two model Epoxy Compounds characteristic of an Epoxy/amide system were adsorbed on the oxides:  N,N‘-dimethylsuccinamide and N-methyldiethanolamine. Additionally, an amine molecule without alcohol groups, N,N‘-diethylmethylamine, was adsorbed to investigate the role of alcohol functionalities on the amine adsorption mechanism. The interaction between the oxide layers and the nitrogenous model Compounds were studied by examination of the O 1s and N 1s XPS photopeaks. The data showed that the amine and amide nitrogen adsorbed via two different bonding modes:  via L...

  • Influence of the Iron Oxide Acid−Base Properties on the Chemisorption of Model Epoxy Compounds Studied by XPS
    The Journal of Physical Chemistry C, 2007
    Co-Authors: Jan Wielant, Tom Hauffman, Orlin Blajiev, René Hausbrand, Herman Terryn
    Abstract:

    In this work, the influence of the iron oxide acid−base properties on the adsorption of model Epoxy Compounds was examined. To study this, iron oxide layers with a different surface hydroxyl fractions were prepared in controllable and reproducible conditions. The surfaces were characterized by X-ray photoelectron spectroscopy (XPS). An expression for the hydroxyl fraction of the oxide films was deduced, starting from the measured XPS intensities. Two model Epoxy Compounds characteristic of an Epoxy/amide system were adsorbed on the oxides:  N,N‘-dimethylsuccinamide and N-methyldiethanolamine. Additionally, an amine molecule without alcohol groups, N,N‘-diethylmethylamine, was adsorbed to investigate the role of alcohol functionalities on the amine adsorption mechanism. The interaction between the oxide layers and the nitrogenous model Compounds were studied by examination of the O 1s and N 1s XPS photopeaks. The data showed that the amine and amide nitrogen adsorbed via two different bonding modes:  via L...