The Experts below are selected from a list of 97386 Experts worldwide ranked by ideXlab platform

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

  • Silver sulfide/poly(3-hydroxybutyrate) nanocomposites: Thermal stability and kinetic analysis of Thermal Degradation
    2020
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    a b s t r a c t The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag 2 S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag 2 S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag 2 S loading in the PHB decreased the onset temperature (T onset ) of Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, E d , was attributed to polymereparticle surface interactions and the agglomeration of Ag 2 S. The Thermal Degradation rate constant, k, was linearly related to the Ag 2 S loading in PHB. Thus, the Ag 2 S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag 2 S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also supported the catalytic property of Ag 2 S

  • silver sulfide poly 3 hydroxybutyrate nanocomposites Thermal stability and kinetic analysis of Thermal Degradation
    Polymer Degradation and Stability, 2010
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag2S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag2S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag2S loading in the PHB decreased the onset temperature (Tonset )o f Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, Ed, was attributed to polymereparticle surface interactions and the agglomeration of Ag2S. The Thermal Degradation rate constant, k, was linearly related to the Ag2S loading in PHB. Thus, the Ag2S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag2S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also

Hidayah Ariffin - One of the best experts on this subject based on the ideXlab platform.

  • determination of multiple Thermal Degradation mechanisms of poly 3 hydroxybutyrate
    Polymer Degradation and Stability, 2008
    Co-Authors: Haruo Nishida, Yoshihito Shirai, Hidayah Ariffin, Mohd Ali Hassan
    Abstract:

    The Thermal Degradation of poly(3-hydroxybutyrate) (PHB) was investigated by kinetic analyses in detail to clarify its complex Degradation behavior, resulting in a finding of mixed mechanisms comprising at least a Thermal random Degradation with subsequent auto-accelerated transesterification, and a kinetically favored chain reaction from crotonate chain ends. The Thermal Degradation behavior of PHB varied with changes in time and/or temperature. From the kinetic analysis of changes in molecular weight, it was found that a non-auto-catalytic random Degradation proceeding in the initial period was followed by an auto-accelerated reaction in the middle period. From the kinetic analysis of weight loss behavior, it is proposed that there are some kinetically favored scissions occurring at the chain ends, where the Degradation proceeded by a 0th-order weight loss process in the middle stage. The observed 0th-order weight loss process was assumed to be an unzipping reaction occurring at ester groups neighboring the crotonate end groups.

S Y Yeo - One of the best experts on this subject based on the ideXlab platform.

  • Silver sulfide/poly(3-hydroxybutyrate) nanocomposites: Thermal stability and kinetic analysis of Thermal Degradation
    2020
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    a b s t r a c t The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag 2 S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag 2 S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag 2 S loading in the PHB decreased the onset temperature (T onset ) of Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, E d , was attributed to polymereparticle surface interactions and the agglomeration of Ag 2 S. The Thermal Degradation rate constant, k, was linearly related to the Ag 2 S loading in PHB. Thus, the Ag 2 S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag 2 S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also supported the catalytic property of Ag 2 S

  • silver sulfide poly 3 hydroxybutyrate nanocomposites Thermal stability and kinetic analysis of Thermal Degradation
    Polymer Degradation and Stability, 2010
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag2S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag2S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag2S loading in the PHB decreased the onset temperature (Tonset )o f Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, Ed, was attributed to polymereparticle surface interactions and the agglomeration of Ag2S. The Thermal Degradation rate constant, k, was linearly related to the Ag2S loading in PHB. Thus, the Ag2S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag2S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also

Mohd Ali Hassan - One of the best experts on this subject based on the ideXlab platform.

  • determination of multiple Thermal Degradation mechanisms of poly 3 hydroxybutyrate
    Polymer Degradation and Stability, 2008
    Co-Authors: Haruo Nishida, Yoshihito Shirai, Hidayah Ariffin, Mohd Ali Hassan
    Abstract:

    The Thermal Degradation of poly(3-hydroxybutyrate) (PHB) was investigated by kinetic analyses in detail to clarify its complex Degradation behavior, resulting in a finding of mixed mechanisms comprising at least a Thermal random Degradation with subsequent auto-accelerated transesterification, and a kinetically favored chain reaction from crotonate chain ends. The Thermal Degradation behavior of PHB varied with changes in time and/or temperature. From the kinetic analysis of changes in molecular weight, it was found that a non-auto-catalytic random Degradation proceeding in the initial period was followed by an auto-accelerated reaction in the middle period. From the kinetic analysis of weight loss behavior, it is proposed that there are some kinetically favored scissions occurring at the chain ends, where the Degradation proceeded by a 0th-order weight loss process in the middle stage. The observed 0th-order weight loss process was assumed to be an unzipping reaction occurring at ester groups neighboring the crotonate end groups.

W L Tan - One of the best experts on this subject based on the ideXlab platform.

  • Silver sulfide/poly(3-hydroxybutyrate) nanocomposites: Thermal stability and kinetic analysis of Thermal Degradation
    2020
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    a b s t r a c t The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag 2 S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag 2 S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag 2 S loading in the PHB decreased the onset temperature (T onset ) of Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, E d , was attributed to polymereparticle surface interactions and the agglomeration of Ag 2 S. The Thermal Degradation rate constant, k, was linearly related to the Ag 2 S loading in PHB. Thus, the Ag 2 S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag 2 S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also supported the catalytic property of Ag 2 S

  • silver sulfide poly 3 hydroxybutyrate nanocomposites Thermal stability and kinetic analysis of Thermal Degradation
    Polymer Degradation and Stability, 2010
    Co-Authors: S Y Yeo, W L Tan, Abu M Bakar, J Ismail
    Abstract:

    The non-isoThermal Degradation of poly(3-hydroxybutyrate) (PHB) and silver sulfide/poly(3-hydroxybutyrate) (Ag2S/PHB) nanocomposites was investigated using thermogravimetric (TG) analysis. In the composite materials, Ag2S caused the Degradation of PHB at a lower temperature as opposed to that of neat PHB. Moreover, an increase Ag2S loading in the PHB decreased the onset temperature (Tonset )o f Thermal Degradation, whereas it was raised upon augmenting the heating rate. From Kissinger plots, the observed trend of the Degradation activation energy, Ed, was attributed to polymereparticle surface interactions and the agglomeration of Ag2S. The Thermal Degradation rate constant, k, was linearly related to the Ag2S loading in PHB. Thus, the Ag2S nanoparticles effectively catalyzed the Thermal Degradation of PHB in the Ag2S/PHB nanocomposites. Differential scanning calorimetry (DSC) data also