scholarly journals Features of the Structure and Physical-Chemical Properties of Poly-Ortho-Toluidine Doped with Toluenesulfonic Acid

2019 ◽  
Vol 20 (1) ◽  
pp. 77-82
Author(s):  
A.L. Stepura ◽  
O.I. Aksimentyeva ◽  
P.Yu. Demchenko
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Specific Resistance ◽  
Oxidative Polymerization ◽  
Chemical Properties ◽  
Conductivity Activation Energy ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Thermal Stability Of

Features of crystal structure, electrical conductivity and thermal stability of poly-ortho-toluidine (PoTi) samples, obtained with method of oxidative polymerization in the environment of sulfuric and toluenesulfonic acids (TSA), were investigated. It was discovered that PoTi-TSA samples are characterized withhigh crystallinity. According to the physico-chemical analysis, doping samples with TSA causes increase of PoTi thermal stability, electrical conductivity and sensor sensitivity on the contrary to samples doped with sulfuric acid. Based on temperature dependence of specific resistance, were calculated the values of the conductivity activation energy, which are within the limits of 0.2-0.4 eV depending on the type of dopant.

Effect of Phenylene Diamine Antioxidant on Physico-Chemical Properties of Methyl Grafted Natural Rubber Polymer Electrolytes

2017 ◽  
Vol 864 ◽  
pp. 48-53
Author(s):  
Ahmad Fairoz Aziz ◽  
Khuzaimah Nazir ◽  
S.F. Ayub ◽  
N.I. Adam ◽  
Muhd Zu Azhan Yahya ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Natural Rubber ◽  
Polymer Electrolytes ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Solution Cast ◽  
Deconvolution Techniques ◽  
Tga And Dsc ◽  
Thermal Stability Of ◽  
Aging Factor

0.5 wt.% of N-(1,3-dimethylbutyl)-N’-phenyl-p-phenylenediamine (6PPD) was introduced into polymer electrolytes based on 30% poly(methyl-methacrylate) grafted natural rubber (MG30) in order to reduce the aging factor of MG30. The polymer electrolyte without 6PPD was used as control. All samples were prepared by using solution cast techniques. The effect of 6PPD in the electrolytes was analysed by using TGA, DSC and FTIR. TGA and DSC results revealed the thermal stability of MG30 electrolytes with 6PPD have higher thermal stability but lower glass transition temperature value. FTIR studies confirmed the existence of LiTF in the sample and prove the occurrence of polymer-salt complexation. Deconvolution techniques analysis on FTIR spectra shows the electrolyte sample with 6PPD display more ion dissociation which reflects to higher ionic conductivity.

Synthesis and Physico-Chemical Properties of Polycyanurates of 2-(N,N-Diphenylhydrazino)4,6-Dichloro-s-Triazine with Various Aromatic Diols

1993 ◽  
Vol 5 (4) ◽  
pp. 307-316 ◽  
Author(s):  
B S Bhonsale ◽  
S N Kaula ◽  
B V Patel ◽  
K C Patel
Keyword(s):  
Thermal Stability ◽  
Chlorinated Solvents ◽  
Chemical Properties ◽  
Interfacial Polycondensation ◽  
Bisphenol S ◽  
Reaction Conditions ◽  
Reduced Viscosity ◽  
Physico Chemical ◽  
Optimum Reaction ◽  
Thermal Stability Of

Various polycynaurates were synhesised by stirred interfacial polycondensation of 2-(N.N-diphenynhydrazino)-4,6-dichloro-s-triaziae (DPHDCT) with each of the aromatic diols: bisphenol-A (BPA); bisphenol-C (BPC); bisphenol-S (BPS); phenolphthalein (Ph); catechol; resorcinol; 1,5and 2.7-dihydroxynaphthalene (DHN-1,5 and DHN-2,7) and 1,8-dihydroxyanthraquinone (DHA-1,8). Interfacial polycondensation of DPHDCT with BPA was investigated in detail in order to select optimum reaction conditions. The yield of polycyanurates varies from 6 I% to 79%. The polycyanurates are soluble in chlorinated solvents such as chloroform, dichloroethane. dichloromethane and chlorobenzene. The reduced viscosity for polycyanurates, determined with a 1 g disolution in chloroform at 25 + 3°C was found to be in the range 0.50-0.68 dl g. All the polycyanurates were characterized by IR spectra. The densities of the polycyanurates, determined using the suspension method at 25 3°C, range between 1.196 and 1.330 g cm. The overall reactivity of diols, based on reduced viscosity values, was found to decrease in the following order: PCBPA> PCPh> PCBPC> PCR>PCDHN-2,7 > PCDHN-I,5 > PCC > PCDHA-1.8 > PCBPS. The thermal stability of polycyanurates, derived from various temperature characteristics, was found to decrease in the following order: PCBPA> PCBPS> PCBPC > PCC PCR> PCDHN-2,7 PCDHN-.l 5 > PCDHA-1,8 > PCPh.

Well-Defined Blackberry-Like Polypyrrole Microspheres via Chemical Oxidative Polymerization in the Presence of Functional Floating Bead as In Situ Dopant

2014 ◽  
Vol 904 ◽  
pp. 159-163 ◽  
Author(s):  
Jia Ping Lao ◽  
Chao Yang ◽  
Hao Dao Mo ◽  
Yu Ping Li ◽  
Li Min Zang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Sulfonic Acid ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
High Electrical Conductivity ◽  
Chemical Oxidative Polymerization ◽  
Inorganic Substrate ◽  
Thermal Stability Of

Functional floating bead (F-FB), prepared by anchoring the organic sulfonic acid on the surface of the blackberry-like structural FB, was used as both the inorganic substrate and the in situ dopant for the in situ chemical oxidative polymerization of pyrrole to obtain the plypyrrole/functional floating bead (PPy/F-FB) nanocomposite material. The composites possess high electrical conductivity at room temperature. Thermogravimetric analysis shows that the thermal stability of PPy/F-FB composites was enhanced and these can be attributed to the retardation effect of sulfonic acid-functionalized FB as barriers for the degradation of PPy. The morphology of PPy/FB composites showed the well-defined blackberry-like morphology.

Physico-chemical properties and thermal stability of microcrystalline cellulose isolated from Alfa fibres

2014 ◽  
Vol 104 ◽  
pp. 223-230 ◽  
Author(s):  
Djalal Trache ◽  
André Donnot ◽  
Kamel Khimeche ◽  
Riad Benelmir ◽  
Nicolas Brosse
Keyword(s):  
Thermal Stability ◽  
Microcrystalline Cellulose ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Thermal Stability Of

A new organic NLO material isonicotinamidium picrate (ISPA): crystal structure, structural modeling and its physico-chemical properties

RSC Advances ◽  
2016 ◽  
Vol 6 (63) ◽  
pp. 57977-57985 ◽  
Author(s):  
RO. MU. Jauhar ◽  
V. Viswanathan ◽  
P. Vivek ◽  
G. Vinitha ◽  
D. Velmurugan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Optical Activity ◽  
Nonlinear Optical ◽  
Chemical Properties ◽  
Structural Modeling ◽  
Optical Material ◽  
Nonlinear Optical Material ◽  
Physico Chemical

A new organic nonlinear optical material isonicotinamidium picrate, with excellent nonlinear optical activity and thermal stability has been reported.

Synthesis and Physico-Chemical Properties of 2-Morpholino-4,6-Dichloro-S-Triazine with Various Aromatic Diols

1996 ◽  
Vol 8 (2) ◽  
pp. 265-273 ◽  
Author(s):  
K C Patel ◽  
S N Kaula ◽  
P S Patel
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Ir Spectra ◽  
Chlorinated Solvents ◽  
Chemical Properties ◽  
Interfacial Polycondensation ◽  
Viscosity Measurements ◽  
Physico Chemical ◽  
Thermal Stability Of

Several homopolycyanurates were synthesized by stirred interfacial polycondensation of 2-morpholino-4,6-dichloro- s-triazine with various aromatic diols such as 1,5- dihydroxynaphthalene,(DHN-1,5),1,7-dihydroxynapthalene(DHN-1,7),2,7-dihydroxynapthalene resorcinol (R), catechol (C), hydroquinone (H) and phenolphthalein (Ph). They were characterized by density, viscosity measurements, IR spectra, solubility tests and thermogravimetric analysis. The polymer had reduced viscosities in the range 0.468 to 0.829 dl g−1 in chromoform at 30 °C. All the polymers were amorphous and soluble in chlorinated solvents. The thermal stability of polycyanurates decreases in the following matter: PCDHN-1,5 > PCDHN-1,7 > PCPh > PCR ≃ PCDHN-2,7 > PCHQ > PCC.

Crystal structure, luminescence, and thermal stability of CsAlSi2O6:Tb3+ phosphors with highly efficient green emission

2021 ◽  
pp. 111441
Author(s):  
Seiya Shimono ◽  
Taichi Izaki ◽  
Nagisa Tanaka ◽  
Yasushi Nanai ◽  
Takaaki Morimoto ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Green Emission ◽  
Highly Efficient ◽  
Thermal Stability Of
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