scholarly journals Investigate the Thermal Analysis Properties of Polymer Electrolyte

2021 ◽  
Vol 2114 (1) ◽  
pp. 012048
Author(s):  
M K Abid ◽  
M M Abbas ◽  
N K Abid ◽  
M K Jwad
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Melting Point ◽  
Polymer Blend ◽  
Ethylene Carbonate ◽  
Weight Ratio ◽  
Cesium Iodide ◽  
Weight Percentage ◽  
Solution Cast ◽  
Cast Technique

Abstract Propylene carbonate (PC) (1:1) have been used as plasticizer to synthesized two series of polymer blend electrolytes (As and Cs) composed of Poly (methyl methacrylate) (PMMA)/Polyacrylonitrile (PAN), (80/20) Wt.% and ethylene carbonate (EC) using solution cast technique. Mixed iodide salts and varying weight ratio of potassium iodide (KI) and cesium iodide (CsI) was used to study the thermal properties of polymer blend electrolytes (GPEs). Differential Scanning Calorimeter (DSC) results show a decrease in the glass transition of electrolytes when increasing the weight percentage of salts, while the melting point increases due to the reduction in the polymer fluidity. Thermogravimetric analysis (TGA) indicates that the increase in the thermal stability can be attributed to the high thermal stability of polymer blend and the existence of the strong interaction between the two polymers. The optimum value of glass transition (Ts) is 104.2 °C found in sample containing 35 Wt.% of KI salt which has a melting point (Tm) 194.7 °C.

scholarly journals PVC/LDPE Blends: Relationship Between Thermal/Mechanical Properties, Structure and Blend Behaviour

2019 ◽  
Vol 4 (1) ◽  
pp. 162-165
Author(s):  
Krisztina Román ◽  
Gabriella Zsoldos
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Structural Transformation ◽  
Polymer Blend ◽  
Analytical Techniques ◽  
Macromolecular Structure ◽  
Scanning Calorimetry ◽  
Thermal Mechanical Properties

In this paper the effect of LDPE content in PVC foams are examined on the structure of both the foam and the LDPE. We attempt to understand how LDPE content affects the structure of PVC in blends and how it changes the glass-transition (Tg). These parameters often provide important information related to the overall macromolecular structure of the polymer blend. Thermal analytical techniques such as differential scanning calorimetry (DSC) often used to determine the structural transformation of samples. The effect of the miscibility and composition of the PVC/LDPE foam blends on the thermal stability were also investigated.

Physical and Electrical Studies of High Molecular Weight Poly (Methyl Methacrylate) Based Solid Polymer Electrolytes

2021 ◽  
Vol 317 ◽  
pp. 393-399
Author(s):  
Norfarlina Azhar ◽  
Ab Malik Marwan Ali ◽  
Rosnah Zakaria ◽  
Mohamad Fariz Mohamad Taib ◽  
Oskar Hasdinor Hassan ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Xrd Analysis ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Salt System ◽  
Electrical Studies ◽  
Solution Cast ◽  
Cast Technique

In this work, the film contained a mixture of PMMA, salt, and plasticizers are studied. PMMA as a host polymer, ammonium trifluoromethane sulphonate or ammonium triflate (NH4CF3SO3) as a doping salt and ethylene carbonate (EC) as a plasticizer is used in this present study. PMMA salt complexes system and plasticized PMMA salt complexes system are prepared by solution cast technique at room temperature. FTIR is used to study the interaction between polymer and salt, and between polymer–salt and plasticizer. The carbonyl group C=O asymmetric stretching mode observed at 1721 cm-1 is broadened and shifted to lower wavenumber when ammonium triflate was added into PMMA. The broadening, shifting and reduction in wavenumbers of FTIR spectra show that the complexation has occurred between the polymer and salt. EIS is performed to measure the electrical conductivity of the polymer–salt system prepared at ambient temperature. The electrical conductivity of film containing 1.0 g of PMMA–35 wt% NH4CF3SO3–16 wt% EC exhibit the highest electrical conductivity with the value of 2.461 x 10-4 S/cm2. XRD is carried out to study the pattern of pure PMMA, PMMA–NH4CF3SO3 and PMMA–NH4CF3SO3–EC. The XRD analysis shows the addition of plasticizer to the polymer–salt system increase the amorphousness of the polymer electrolytes hence increases in conductivity.

Ionic Conductivity of PVC-NH4I-EC Proton Conducting Polymer Electrolytes

2012 ◽  
Vol 545 ◽  
pp. 312-316 ◽  
Author(s):  
Siti Khatijah Deraman ◽  
Ri Hanum Yahaya Subban ◽  
Mohamed Nor Sabirin
Keyword(s):  
Fourier Transform ◽  
Polymer Electrolytes ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Poly Vinyl Chloride ◽  
Solution Cast ◽  
Conductivity Behavior ◽  
Cast Technique

Poly(vinyl) chloride (PVC)-NH4I-EC films have been prepared by solution cast technique. The sample containing 30 wt. % NH4I exhibited highest room temperature conductivity of 4.60 × 10-7S cm-1. The conductivity increased to 1.08 × 10-6Scm-1when 15 wt. % of ethylene carbonate (EC) was added to 70 wt. % PVC - 30 wt. % NH4I. Fourier Transform Infrared (FTIR) showed evidence of polymer–salt complexation while DSC showed increase in glass transition temperature (Tg) of PVC -NH4I - EC polymer electrolytes. The conductivity behavior of the studied system could be accounted by the changes in Tgvalues.

Ionic Conductivity and Dielectric Properties of Plasticized Polyacrylonitrile Based Solid Polymer Electrolyte Films

2012 ◽  
Vol 626 ◽  
pp. 211-214
Author(s):  
W.G. Chong ◽  
Zurina Osman ◽  
Lisani Othman ◽  
Khairul Bahiyah Md. Isa
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Solid Polymer ◽  
Arrhenius Relation ◽  
Solution Cast ◽  
Host Polymer ◽  
Cast Technique

The conducting polymer electrolyte films composed of polyacrylonitrile (PAN) as the host polymer, LiCF3SO3 and NaCF3SO3 as inorganic salts and ethylene carbonate (EC) as plasticizer were prepared by the solution cast technique. The conductivities of the films were characterized by impedance spectroscopy. On addition of more than 14 wt% of salt, the NaCF3SO3-containing PAN films exhibited higher ionic conductivity than the LiCF3SO3-containing PAN films. The values of the dielectric constant, εr and dielectric loss, εi increase as frequency decreases at room temperature. The temperature dependence of the conductivity obeys Arrhenius relation in the temperature range of 303 K to 353 K.

scholarly journals Preparation and Composition Optimization of PEO:MC Polymer Blend Films to Enhance Electrical Conductivity

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 853 ◽  
Author(s):  
Hawzhin T. Ahmed ◽  
Omed Gh. Abdullah
Keyword(s):  
Polymer Blend ◽  
Weight Ratio ◽  
Optical Microscope ◽  
Electrical Impedance Spectroscopy ◽  
Solid Polymer ◽  
Degree Of Crystallinity ◽  
Absorption Bands ◽  
Debye Relaxation ◽  
Blend Films ◽  
Solution Cast

The polymer blend technique was used to improve amorphous phases of a semicrystalline polymer. A series of solid polymer blend films based on polyethylene oxide (PEO) and methylcellulose (MC) were prepared using the solution cast technique. X-ray diffraction (XRD), Polarized optical microscope (POM), Fourier transform infrared (FTIR) and electrical impedance spectroscopy (EIS) were used to characterize the prepared blend films. The XRD and POM studies indicated that all polymer blend films are semicrystalline in nature, and the lowest degree of crystallinity was obtained for PEO:MC polymer blend film with a weight ratio of 60:40. The FTIR spectroscopy was used to identify the chemical structure of samples and examine the interactions between chains of the two polymers. The interaction between PEO and MC is evidenced from the shift of infrared absorption bands. The DC conductivity of the films at different temperatures revealed that the highest conductivity 6.55 × 10−9 S/cm at ambient temperature was achieved for the blend sample with the lowest degree of crystallinity and reach to 26.67 × 10−6 S/cm at 373 K. The conductivity relaxation process and the charge transport through the hopping mechanism have been explained by electric modulus analysis. The imaginary part of electrical modulus M″ shows an asymmetrical peak, suggesting a temperature-dependent non-Debye relaxation for the PEO:MC polymer blend system.

Structural and Electrical Properties of PVC-NH4CF3SO3-EC Proton Conducting Electrolyte System

2011 ◽  
Vol 287-290 ◽  
pp. 2240-2243 ◽  
Author(s):  
Siti Khatijah Deraman ◽  
N.S. Mohamed ◽  
R.H.Y. Subban
Keyword(s):  
Conducting Polymer ◽  
Ethylene Carbonate ◽  
X Ray Diffraction ◽  
Electrolyte System ◽  
Proton Conducting ◽  
X Ray ◽  
Structural And Electrical Properties ◽  
Solution Cast ◽  
Crystalline Nature ◽  
Cast Technique

Poly (vinyl) chloride (PVC)-based proton conducting polymer electrolytes have been prepared by solution cast technique. The effect of addition of ethylene carbonate (EC) as the plasticizer on the structural property of the prepared proton conducting polymer electrolyte system was investigated by X-Ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) while its effect on electrical property was investigated by Impedance Spectroscopy (IS). With addition of plasticizer, the crystalline nature of the polymer was found to be disrupted as revealed by X-Ray diffraction. FTIR showed interactions between Cl-and H+which was accounted by shifts in the bands of Cl-. Ionic conductivity was found to be 3.06 x 10-5S cm-1at room temperature (300 K)for the films containing 95 wt. % (PVC -NH4CF3SO3) –5 wt. % EC.

Effect of TiO2 on Optical Properties of PMMA: An Optical Characterization

2011 ◽  
Vol 383-390 ◽  
pp. 3249-3256 ◽  
Author(s):  
Gaurang Patel ◽  
M.B. Sureshkumar ◽  
Purvi Patel
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Optical Transmission ◽  
Energy Gap ◽  
Optical Characterization ◽  
Weight Percentage ◽  
Optical Dielectric Constant ◽  
Solution Cast ◽  
Optical Dielectric ◽  
Cast Technique

The transmittance, absorbance, and reflectance of PMMA/TiO2 composites, in different weight percentage of TiO2, prepared by a solution cast technique are investigated. The Optical transmission and UV-VIS absorption spectra have been recorded in the wavelength range 200nm-800nm for different compositions of TiO2 doped PMMA polyfilms. The absorption coefficient, optical (Direct/Indirect) energy gap, Refractive index, Optical Dielectric constant, Constant B, ratio of carrier concentration to the effective mass have been evaluated. The effects of doping percentage of TiO2 on these parameters have been discussed and behaviors of all parameters are investigated.

scholarly journals Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid

2019 ◽  
Vol 17 (1) ◽  
pp. 1080-1086
Author(s):  
Elżbieta Chmiel-Szukiewicz
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Boric Acid ◽  
Ethylene Carbonate ◽  
Pyrimidine Ring ◽  
Polyurethane Foams ◽  
High Thermal Stability ◽  
H Nmr ◽  
Maldi Tof ◽  
Instrumental Methods

AbstractSyntheses of oligoetherols with a 1,3-pyrimidine ring and boron atoms using 6-aminouracil, ethylene carbonate and boric acid has been proposed. The structure of the obtained products were determined by instrumental methods (IR, 1H-NMR and MALDI-ToF spectra). The physicochemical and thermal properties of oligoetherols were examined. The products were characterized by high thermal stability. Based on the tests performed, it was found that oligoetherols obtained from 6-aminouracil, boric acid and ethylene carbonate are suitable for the manufacturing of polyurethane foams with improved thermal stability and reduced flammability.

Investigating the role of GeO2 in enhancing the thermal stability and proton mobility of proton-conducting phosphate glasses

2021 ◽  
Author(s):  
Takahisa Omata ◽  
Aman Sharma ◽  
Takuya Kinoshita ◽  
Issei Suzuki ◽  
Tomohiro Ishiyama ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Phosphate Glasses ◽  
Proton Mobility ◽  
Proton Conducting

In this study, the effect of GeO2 on the thermal stability and proton mobility (μH) of proton-conducting phosphate glasses was experimentally investigated using 22HO1/2−3NaO1/2−(12−x)LaO3/2−xGeO2−63PO5/2 glasses. Increasing glass transition temperature (Tg)...

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