The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform

D L H Tagle - One of the best experts on this subject based on the ideXlab platform.

  • thermal analysis of metal Polyacrylonitriles
    Thermochimica Acta, 1991
    Co-Authors: T G Cardenas, C C Retamai, D L H Tagle
    Abstract:

    Abstract The thermal stabilities of metal Polyacrylonitriles (MPAN) were studied by thermogravimetric analysis (TGA) between 25 and 550°C under nitrogen flowing at 10°C min −1 . The metal contents of the polymers and their molecular weights are also reported. The kinetic data obtained by TGA showed that the thermostabilities of these polymers decrease in the order: Ge-PAN > Ga-PAN > Au-PAN > Sn-PAN > Bi-PAN > In-PAN > Pd-PAN > Sb-PAN. The experimental data suggest that the thermal stability of these polymers depends on the metal and the amount of metal incorporated. The reaction order for the one-step thermal decomposition of the polymers was found to be zero. The pre-exponential factor, the reaction order and the activation energies for the decomposition of the metal Polyacrylonitriles were determined.

T G Cardenas - One of the best experts on this subject based on the ideXlab platform.

  • thermal analysis of metal Polyacrylonitriles
    Thermochimica Acta, 1991
    Co-Authors: T G Cardenas, C C Retamai, D L H Tagle
    Abstract:

    Abstract The thermal stabilities of metal Polyacrylonitriles (MPAN) were studied by thermogravimetric analysis (TGA) between 25 and 550°C under nitrogen flowing at 10°C min −1 . The metal contents of the polymers and their molecular weights are also reported. The kinetic data obtained by TGA showed that the thermostabilities of these polymers decrease in the order: Ge-PAN > Ga-PAN > Au-PAN > Sn-PAN > Bi-PAN > In-PAN > Pd-PAN > Sb-PAN. The experimental data suggest that the thermal stability of these polymers depends on the metal and the amount of metal incorporated. The reaction order for the one-step thermal decomposition of the polymers was found to be zero. The pre-exponential factor, the reaction order and the activation energies for the decomposition of the metal Polyacrylonitriles were determined.

Satish Kumar - One of the best experts on this subject based on the ideXlab platform.

  • Development of single filament testing procedure for polyacrylonitrile precursor and polyacrylonitrile-based carbon fibers
    Journal of Composite Materials, 2020
    Co-Authors: Kevin M. Lyons, Han Gi Chae, Bradley A. Newcomb, Kenneth J. Mcdonald, Satish Kumar
    Abstract:

    Single filament testing protocols for polyacrylonitrile precursor and polyacrylonitrile-based carbon fibers have been developed to ensure reliable tensile results that can be compared to the standa...

  • Functional polymer-polymer/carbon nanotube bi-component fibers
    Polymer, 2013
    Co-Authors: An Ting Chien, Aniruddha S. Joshi, Jaeyun Moon, Han Gi Chae, Prabhakar V. Gulgunje, G P Peterson, Bo Feng, Satish Kumar
    Abstract:

    Bi-component fibers typically combine multiple functions that arise from at least two distinct components. As a result, these fibers can incorporate carbon nanotubes, which impart specific and controllable mechanical, electrical, and thermal transport properties to the fibers. Using gel spinning, sheath-core polyacrylonitrile-polyacrylonitrile/carbon nanotube bi-component fibers with a diameter of less than 20 μm and carbon nanotube concentrations of up to 10 wt% were produced. In these fibers, the carbon nanotubes were well dispersed and aligned along the fiber axis. The fibers exhibited a tensile strength as high as 700 MPa, and a tensile modulus as high as 20 GPa, as well as enhanced electrical and thermal conductivities when compared to the fibers without carbon nanotubes. © 2013 Elsevier Ltd. All rights reserved.

C C Retamai - One of the best experts on this subject based on the ideXlab platform.

  • thermal analysis of metal Polyacrylonitriles
    Thermochimica Acta, 1991
    Co-Authors: T G Cardenas, C C Retamai, D L H Tagle
    Abstract:

    Abstract The thermal stabilities of metal Polyacrylonitriles (MPAN) were studied by thermogravimetric analysis (TGA) between 25 and 550°C under nitrogen flowing at 10°C min −1 . The metal contents of the polymers and their molecular weights are also reported. The kinetic data obtained by TGA showed that the thermostabilities of these polymers decrease in the order: Ge-PAN > Ga-PAN > Au-PAN > Sn-PAN > Bi-PAN > In-PAN > Pd-PAN > Sb-PAN. The experimental data suggest that the thermal stability of these polymers depends on the metal and the amount of metal incorporated. The reaction order for the one-step thermal decomposition of the polymers was found to be zero. The pre-exponential factor, the reaction order and the activation energies for the decomposition of the metal Polyacrylonitriles were determined.

Ge Mingqiao - One of the best experts on this subject based on the ideXlab platform.

  • Structure and properties of polyacrylonitrile / Ca-montmorillonite nanocomposite fibers
    Textile Research Journal, 2020
    Co-Authors: Ge Mingqiao
    Abstract:

    The polyacrylonitrile / Ca-montmorillonite(Ca-MMT) nanocomposite fibers were prepared via solution blending and wet spinning.The TEM and X-ray diffraction were used to observe the dispersing of Ca-MMT in the polyacrylonitrile matrix,and the tensile strength of polyacrylonitrile / Ca-montmorillonite(Ca-MMT) nanocomposite fibers was tested using the single fiber tensile tester as a function of the mass fraction of Ca-MMT.The results indicated that the Ca-MMT which has been subjected to UV radiation and ultrasonic vibration treatment can well disperse in the polyacrylonitrile matrix so that the tensile strength of the fibers is enhanced.

  • Structure and Properties of Polyacrylonitrile/Na-montmorillonite Nanocomposite Fiber
    Materials review, 2020
    Co-Authors: Ge Mingqiao
    Abstract:

    The polyacrylonitrile/Na-montmorillonite(Na-MMT)nanocomposite is prepared via emulsion copo-lymerization.X-ray diffraction result suggests that the Na-MMT layers are exfoliated and the Na-MMT exhibits good dispersion in the polymer matrix.It is found that the polyacrylonitrile/Na-MMT nanocomposite fiber exhibits consi-derably enhanced mechanical and thermal properties compared with the polyacrylonitrile fiber without nano Na-MMT.