Preparation and Characterization of Epoxidized-30% Poly(methyl methacrylate)-grafted Natural Rubber Polymer Electrolyte

2014 ◽  
Vol 28 ◽  
pp. 163-170 ◽  
Author(s):  
Khuzaimah Nazir ◽  
Siti Fadzilah Ayub ◽  
Ahmad Fairoz Aziz ◽  
Ab Malik Marwan Ali ◽  
Muhd Zu Azhan Yahya
Keyword(s):  
Ionic Conductivity ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Ionic Conduction ◽  
Lithium Triflate ◽  
Poly Methyl Methacrylate ◽  
Order Of Magnitude ◽  
Cast Technique

In this study, a freestanding thin film composed of lithium triflate (LiTf) salt (30-40 wt.%) and epoxidized-30% poly (methyl methacrylate)-grafted natural rubber (EMG30) (50, 54.6, 62.3 mol %) were prepared by a solvent cast technique. The EMG30 were found to increase the ionic conductivity of EMG30-LiTf by one order of magnitude compared to MG30-LiTf. The highest ionic conductivity achieved was 5.584 x10-3Scm-1at room temperature when 40 wt.% of LiTf salts were introduced into 62.3 mol % EMG30. The ionic conduction mechanisms in EMG30-LiTf electrolytes obey Arrhenius rule in which the ion transport in these materials is thermally assisted.

Preparation and Characterization of Elastomers Based on Polydimethylsiloxane/Poly(methyl methacrylate) Blends

2012 ◽  
Vol 535-537 ◽  
pp. 1193-1196
Author(s):  
Nai Qiang Zhang ◽  
Jian Dong ◽  
Hong Yu Chen
Keyword(s):  
Methyl Methacrylate ◽  
Room Temperature ◽  
Radical Copolymerization ◽  
Cross Linking ◽  
Scanning Calorimetry ◽  
Silicone Elastomers ◽  
Poly Methyl Methacrylate ◽  
Dsc Measurements ◽  
Pmma Blends

Polydimethylsiloxane/poly (methyl methacrylate) (PDMS/PMMA) blends were prepared by radical copolymerization of methyl methacrylate (MMA) and divinylbenzene (DVB) in the presence of PDMS. Elastomers based on PDMS/PMMA blends were formed by cross-linking PDMS with methyltriethoxysilane (MTES). Mechanical property measurements show that the elastomers thus formed exhibit superior tensile strength with respect to general room temperature vulcanized silicone elastomers containing silica. Moreover, investigations were carried out on the elastomers by extraction, scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) measurements. SEM shows that the elastomer has a microphase-separated structure consisting of dispersed PMMA domains within a continuous PDMS matrix. DSC result shows that the elastomers display two glass transition temperatures and confirm the incompatible nature of PDMS and PMMA.

Studies of Ionic Conductivity and Dielectric Behavior in Polyacrylonitrile Based Solid Polymer Electrolytes

2011 ◽  
Vol 312-315 ◽  
pp. 116-121 ◽  
Author(s):  
Zurina Osman ◽  
Khairul Bahiyah Md. Isa ◽  
Lisani Othman ◽  
Norlida Kamarulzaman
Keyword(s):  
Ionic Conductivity ◽  
Room Temperature ◽  
Dielectric Behavior ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Ion Diffusion ◽  
Lithium Triflate ◽  
Different Temperatures ◽  
Solution Cast ◽  
Cast Technique

The solid polymer electrolyte films consisting of polyacrylonitrile (PAN) as the host polymer, lithium triflate (LiCF3SO3) and sodium triflate (NaCF3SO3) as dopant salts were prepared by the solution cast technique. The pure PAN film was prepared as a reference. The films were characterized using a.c. impedance spectroscopy. At room temperature, the highest conductivity for the sample from the (PAN+LiCF3SO3) system and the (PAN+NaCF3SO3) system is 3.04 x 10-4 Scm-1 and 7.13 x 10-4 Scm-1, respectively. The temperature dependence of ionic conductivity for the highest conducting film from both systems follows the Arrhenius equation in the temperature range of 303 K to 353 K. The frequency dependence of ionic conductivity, , complex permittivity, *, and complex electrical modulus, M* were studied at different temperatures. The ionic conductivity and the dielectric behavior are described in terms of ion diffusion and polarization.

scholarly journals Stable and sensitive amino-functionalized graphene/polyaniline nanofiber composites for room-temperature carbon dioxide sensing

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 41240-41247 ◽  
Author(s):  
Hanan Abdali ◽  
Bentolhoda Heli ◽  
Abdellah Ajji
Keyword(s):  
Carbon Dioxide ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Functionalized Graphene ◽  
Poly Methyl Methacrylate ◽  
New Material ◽  
Polyaniline Nanofiber ◽  
Nanofiber Mats

This article describes the preparation and characterization of amino-functionalized graphene (AmG)/polyaniline (PANI)/poly(methyl methacrylate) (PMMA) nanofiber mats along with the efficiency of these nanofiber composites as a new material for sensing carbon dioxide (CO2) gas.

Conductivity and Thermal Behaviour of Epoxidized-30% Poly (Methyl Methacrylate)-Grafted Natural Rubber-Lithium Triflate Based Solid Polymer Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 175-180
Author(s):  
Khuzaimah Nazir ◽  
Siti Fadzilah Ayub ◽  
Ahmad Fairoz Aziz ◽  
Rosnah Zakaria ◽  
Mohamad Faizul Yahya ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Conductivity Measurement ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Gravimetric Analysis ◽  
Lithium Triflate ◽  
Poly Methyl Methacrylate ◽  
Casting Technique ◽  
Ionic Conductivity Measurement

Thin films of epoxidized-30% poly (methyl methacrylate)-grafted natural rubber (EMG30) doped with lithium triflate (LiTf) salt were prepared by using the solution-casting technique. Transformation of carbon double bond (C=C) into epoxide group (C-O-C) in EMG30 polymer host was confirmed by 1HNMR analysis. The ionic conductivity measurement was carried out and the highest conductivity was found to be at 5.843×10-3 S cm room temperature for the sample with composition at 60wt% EMG30: 40wt% LiTf. Thermal gravimetric analysis studies showed that upon the addition of lithium salts into EMG30 was increased the thermal stability of the polymer electrolyte systems.

Anions Effect on the Electrical Properties of PMMA/ENR 50 Blend Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 145-150 ◽  
Author(s):  
Famiza Latif ◽  
Sharil Fadli Mohamad Zamri ◽  
Madzlan Aziz
Keyword(s):  
Ionic Conductivity ◽  
Electrical Properties ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Lattice Energy ◽  
Solvent Casting ◽  
Electrolyte System ◽  
Casting Technique

<h1>The lattice energy of the doping salt for a polymer electrolyte is crucial because it affects the ionic conductivity of the polymer electrolyte system. It is also known that the lattice energy of a salt depends on the size of the anion. The larger the anion the lower the lattice energy of the salt. Therefore, in this study the effect of the anion size of various doping salts; LiNO3 and LiN(CF3SO2)2 with lattice energy of 848 kJ/mol and 489.4 kJ/mol, respectively were investigated and compared with LiCF3SO3 salt (735 kJ/mol) on the electrical properties of poly (methyl methacrylate) (PMMA) / epoxidised natural rubber (ENR 50) blend film. All the doped PMMA/ENR 50 films were prepared by solvent casting technique. Surprisingly, though LiN(CF3SO2)2 exhibited the lowest lattice energy, it displayed the lowest ionic conductivity value of 10-8 S/cm at room temperature as compared to LiNO3 and LiBF4 due to its poor coordinating power with the polymer. This was confirmed from the FTIR analyses. Further investigation on the dielectric behaviour of the doped PMMA/ENR 50 films were also reported.</h1> <p></p>

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