Impact of nanoclay on physicomechanical, morphological, optical, BET isotherm, and thermal analysis of polyvinyl alcohol/fumed silica/clay nanocomposites

2018 ◽  
pp. 33-43
Author(s):  
Md. Rezaur Rahman ◽  
Josephine Lai Chang Hui ◽  
Sinin bin Hamdan
Keyword(s):  
Thermal Analysis ◽  
Polyvinyl Alcohol ◽  
Fumed Silica ◽  
Clay Nanocomposites ◽  
Bet Isotherm

Impact of nanoclay on physicomechanical and thermal analysis of polyvinyl alcohol/fumed silica/clay nanocomposites

2014 ◽  
Vol 132 (15) ◽  
pp. n/a-n/a ◽  
Author(s):  
Josephine Chang-Hui Lai ◽  
Md. Rezaur Rahman ◽  
Sinin Hamdan ◽  
Fui Kiew Liew ◽  
Md. Mizanur Rahman ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Polyvinyl Alcohol ◽  
Fumed Silica ◽  
Clay Nanocomposites

scholarly journals PHYSICAL, MECHANICAL, MORPHOLOGICAL AND THERMAL ANALYSIS OF STYRENE-CO-GLYCIDYL METHACRYLATE / FUMED SILICA / CLAY NANOCOMPOSITES

2017 ◽  
Vol 79 (5) ◽  
Author(s):  
Josephine Chang Hui Lai ◽  
Md. Rezaur Rahman ◽  
Sinin Hamdan
Keyword(s):  
Electron Microscopy ◽  
Activation Energy ◽  
Thermal Analysis ◽  
Fumed Silica ◽  
Glycidyl Methacrylate ◽  
Moisture Absorption ◽  
Clay Nanocomposites ◽  
Average Pore ◽  
Ft Ir ◽  
Scanning Electron

Styrene-co-glycidyl methacrylate-fumed silica-clay (ST-co-GMA-fsi-clay) nanocomposites have been prepared via free radical polymerization in the presence of benzoyl peroxide. The nanocomposites are characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), adsorption isotherm, tensile test, thermogravimetric analysis (TGA) and moisture absorption. FT-IR shows the Si-O-C peak that represented ST-co-GMA-fsi bonding while Si-O-Si peak shows the bonding of fsi-clay. The surface morphology shows the well dispersion of clay (1.30E) into ST-co-GMA-fsi nanocomposite. 2wt% of ST-co-GMA-fsi-clay (1.30E) nanocomposite has higher specific surface area and average pore volume with less pore size. Incorporation of 2wt% of clay (1.30E) improves the tensile strength and modulus of the nanocomposites as well as higher thermal stability and activation energy. 2wt% of ST-co-GMA-fsi-clay (1.30E) nanocomposite shows the lowest moisture absorption value.  

scholarly journals INFLUENCE OF SOME PARAMETERS IN THE RESULTS OF THERMAL ANALYSIS OF POLYVINYL ALCOHOL

2019 ◽  
Vol 16 (31) ◽  
pp. 235-241
Author(s):  
Mariana Fornazier BORGES
Keyword(s):  
Thermal Analysis ◽  
Polyvinyl Alcohol ◽  
Heating Rate ◽  
Synthetic Polymer ◽  
Qualitative And Quantitative ◽  
Physical Form ◽  
Series Of Experiments ◽  
Rate Type ◽  
Tga And Dsc ◽  
Dsc Curves

The present work seeks to demonstrate through a series of experiments such as the parameters heating rate, type of stand and physical form of the sample, can influence the qualitative and quantitative aspects of the results of the thermal analyzes of TGA and DSC. To do this, polyvinyl alcohol, a synthetic polymer was used as a model and its thermal behavior was discussed by the results obtained by the thermogravimetric (TGA) and DSC curves, showing the effect of the alteration of each parameter, such as the displacement at the temperature at which the thermal events occur in the TGA curves, related to the alteration of the physical form of the sample; the intensification of the DSC peaks due to the increase of the heating rate, the change in the heat flow by changing the stand and masking some events such as the glass transition temperature.

Enhanced performance of a direct methanol alkaline fuel cell (DMAFC) using a polyvinyl alcohol/fumed silica/KOH electrolyte

2010 ◽  
Vol 195 (24) ◽  
pp. 7991-7999 ◽  
Author(s):  
Shingjiang Jessie Lue ◽  
Wei-Ting Wang ◽  
K.P.O. Mahesh ◽  
Chun-Chen Yang
Keyword(s):  
Fuel Cell ◽  
Polyvinyl Alcohol ◽  
Fumed Silica ◽  
Alkaline Fuel Cell ◽  
Direct Methanol

Thermomechanical performance and high Brunauer-Emmett-Teller surface area of poly(vinyl alcohol)/silica/clay and poly(vinyl alcohol)/(fumed silica)/clay nanocomposites

2015 ◽  
Vol 23 ◽  
pp. E119-E127 ◽  
Author(s):  
Josephine Chang Hui Lai ◽  
Md. Rezaur Rahman ◽  
Sinin Hamdan ◽  
Mahbub Hasan ◽  
Liew Fui Kiew ◽  
...  
Keyword(s):  
Surface Area ◽  
Fumed Silica ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Clay Nanocomposites

Modeling water states in polyvinyl alcohol-fumed silica nano-composites

Polymer ◽  
2009 ◽  
Vol 50 (2) ◽  
pp. 654-661 ◽  
Author(s):  
Shingjiang Jessie Lue ◽  
Song-Jiang Shieh
Keyword(s):  
Polyvinyl Alcohol ◽  
Fumed Silica ◽  
Nano Composites

scholarly journals STUDI KONDUKTIVITAS ELEKTROLIT POLIMER KITOSAN/PVA+KOH

2011 ◽  
Vol 1 (2) ◽  
pp. 13-17
Author(s):  
R.Putri ◽  
A.Maddu ◽  
Irzaman
Keyword(s):  
Thermal Analysis ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Polymer Electrolyte ◽  
Potassium Hydroxide ◽  
Room Temperature ◽  
Casting Technique

The blend-based polymer electrolyte consisting of chitosan and polyvinyl alcohol (PVA) as host polymers and potassium hydroxide (KOH) as the complexing salt was studied. Polymerelectrolyte were obtained by the casting technique. An attempt was also made to investigate the effect of TiO2 concentration in the chitosan/PVA+KOH polymer electrolyte. The best ionic conductivity values of 1,105 x 10-2 S cm-1 at room temperature were obtained for the sample containing 35%wt of KOH and 1,210 x 10-2 S cm-1 for the sample containing 50% wt TiO2. The polymer electrolyte with good ionic conductivity properties were characterized by thermal analysis (DSC). The glass transition temperature about 75.30 °C for the optimum Chitosan/PVA+KOH

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