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Probing Synergism, Antagonism, And Additive Effects In Poly(Vinyl Ester) (Pve) Composites With Fire Retardants, Everson Kandare, Grace Chigwada, Dongyan Wang, Charles Wilkie, Jeanne Hossenlopp
Probing Synergism, Antagonism, And Additive Effects In Poly(Vinyl Ester) (Pve) Composites With Fire Retardants, Everson Kandare, Grace Chigwada, Dongyan Wang, Charles Wilkie, Jeanne Hossenlopp
Chemistry Faculty Research and Publications
Potential fire retardants, including copper hydroxy dodecyl sulfate (CHDS), organically-modified montmorillonite (Cloisite 15A), and resorcinol di-phosphate (RDP), were added to pure poly(vinyl ester) (PVE) individually or in combinations at low concentration formulations. Thermogravimetric analysis and cone calorimetry were used to study the thermal stability and fire performance of the composites. Synergistic, antagonistic, and additive effects were observed depending on the specific formulation. Time to self-sustained combustion is greatly reduced, but the flame extinguishes faster, for the composites containing CROS alone or in combination with either RDP or Cloisite 15A compared to the virgin polymer. The presence of copper in PVE …
Thermal Stability And Degradation Kinetics Of Poly(Methyl Methacrylate)/Layered Copper Hydroxy Methacrylate Composites, Everson Kandare, Hongmei Deng, Dongyan Wang, Jeanne Hossenlopp
Thermal Stability And Degradation Kinetics Of Poly(Methyl Methacrylate)/Layered Copper Hydroxy Methacrylate Composites, Everson Kandare, Hongmei Deng, Dongyan Wang, Jeanne Hossenlopp
Chemistry Faculty Research and Publications
Poly(methyl methacrylate) (PMMA)/copper hydroxy methacrylate (CHM) composites were prepared via solution blending and bulk polymerization. Addition of 3% by weight of the CHM additive using solution blending resulted in a significant increment (~45°C) in thermogravimetric analysis (TGA) T50, the temperature at which 50% of the original polymeric mass is lost. The value T50 increased by 30°C for a PMMA composite with 4% CHM, synthesized via bulk polymerization. Activation energies, Ea, were calculated as a function of conversion fractions (TGA decomposition profile) for the polymeric materials. Analysis of multiple heating rate data using the Flynn–Wall– Ozawa …