Analytical and electrical studies on poly(2-vinylpyridine) and its metal complexes

Rafique, Uzaira; Mazhar, M.; Ali, Saqib; Khwaja, Farid A.

doi:10.1016/0379-6779(95)03570-2

Cited by 14 publications

(16 citation statements)

References 20 publications

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“…This value is Ϫ9 about 10 times higher than that obtained at 25ЊC. 6 The conductivity results of blends with 80% mol of P2VP are almost the same as those of the pure polymer, due to an unsaturation effect of the metallic group in the polymeric chain. Regarding the linear increase in conductivity for P2VP blends with 50 and 20% mol of inorganic salt, the pair of electrons on the nitrogen is given to the metal d-orbital which overlaps with or * orbitals of the ligand, thus forming a conduction in the polymer complex backbone chain.…”

Section: ϫ15 ϫ5supporting

confidence: 54%

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Thermal behavior and electrical conductivity of poly(vinyl pyridine)/copper complexes

Rodrigues

Gonçalves

Mangrich

et al. 2000

Adv. Polym. Technol.

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Poly(2‐vinyl pyridine) [P2VP] and poly(4‐vinyl pyridine) [P4VP]/copper iodide binary mixtures were studied by differential scanning calorimetry (DSC) in order to investigate the phase behavior of the blends at microscopic level. The glass transition temperature (Tg) of the P2VP/copper iodide binary mixtures as compared with pure polymer increased by 80°C when the amount of Cu(I) in the blend was increased up to 40/60 wt/wt monomer/inorganic salt composition for P2VP. For P4VP, the Tg increased by 40°C in an 80/20 wt/wt decreasing by 10°C at 60/40 wt/wt. Fourier transform infrared (FTIR) and Raman spectroscopy provided molecular‐level data, suggesting that copper coordinates with pyridine rings via nitrogen ion pairs in a metal‐ligand bonding. Conductivity measurements were carried out at different temperatures and compositions, and upon increasing the amount of copper iodine in the blends, the conductivity increased drastically. © 2000 John Wiley & Sons, Inc. Adv Polym Techn 19: 113–119, 2000

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Section: ϫ15 ϫ5supporting

confidence: 54%

“…Conjugated double-bond poly- [4][5][6][7] mers in the presence of dopant agents can present higher values of electrical conductivity than pure polymers. They also exhibit higher thermal stability and processing facility in solution.…”

Section: Abstract: Poly(2-vinyl Pyridine) [P2vp] and Poly(4-vinyl Pyrmentioning

confidence: 99%

Thermal behavior and electrical conductivity of poly(vinyl pyridine)/copper complexes

Rodrigues

Gonçalves

Mangrich

et al. 2000

Adv. Polym. Technol.

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“…20 It was found that three lifetime components gave the reasonable standard deviations and the best 2 (1.1). The shortest lifetime 1 …”

Section: Measurements Of Positron Annihilation Lifetime Spectroscopymentioning

confidence: 99%

“…1 Even some polymers such as polyacetylene doped with AsF 5 2 or halogen-doped polyacetylene 3 were found to have conducting properties. Unworth et al 4 mentioned that there are over 100 conducting polymers that have been synthesized by chemists, with a wide range of specific electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Effect of doping polyacrylic acid with some dopants as studied by different techniques

Mostafa

Mohamed

2002

J of Applied Polymer Sci

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ABSTRACT:The molecular weight of polyacrylic acid (PAA) was determined by a viscometric method using NaNO 3 as solvent at 30°C. The specific electric conductivities () of PAA as well as PAA doped with carbon black (CB), chromium oxide (Cr 2 O 3 ), and cupferron with different concentrations (from 0.25 to 1 wt %) were measured at a temperature range 360 -400 K. IR spectra of some polymers were determined and it was shown that when PAA was doped with 0.5 wt % CB, a COOOC band appeared at 775-875 cm Ϫ1 . The positron annihilation lifetime (PAL) spectra in PAA doped with the above-mentioned dopants were measured as a function of their concentrations. It was observed that the short lifetime intensity I 1 decreased, whereas the intermediate lifetime intensity I 2 , which is related to the conductivity of the material, increased with increasing the wt % of Cr 2 O 3 and cupferron as well as at low concentrations of CB. These results are discussed in terms of the conducting island model. It was found that there were distinct positive relationships between and I 2 .

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“…Poly(2‐vinylpyridine) (P2VP) and its metal‐based derivatives have been synthesized and characterized through analytical measurements, molar mass measurements, and thermal analysis 9. These complexes have been prepared10–13 by the complexation of P2VP with metal salts. The conductivity of 2‐vinylpyridine (2VP) has been found to increase by many orders of magnitude on combination with transition metals such as copper, cobalt, and platinum.…”

Section: Introductionmentioning

confidence: 99%

Effects of some solvents on the thermal and free‐volume properties of poly(4‐vinylpyridine) complexes

Mazroua¹,

Gomaa²

2008

J of Applied Polymer Sci

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Modified poly(4-vinylpyridine) (P4VP) and its complexes were prepared with different solvents such as benzene, toluene, and xylene as well as potassium chloride (KCl) and copper chloride (CuCl 2 ). Fourier transform infrared spectroscopy, thermal analysis, and positron annihilation spectroscopy were used to investigate the properties of the modified P4VP and its complexes. It was concluded that complexes were formed between the polymer and solvents via quaternization of nitrogen in the ring with the solvents and also with KCl and CuCl 2 Á2H 2 O. Furthermore, the modified P4VP-CuCl 2 complexes were more stable than the modified P4VP-KCl complexes, and these complexes were more stable than the P4VP-solvent complexes. Ortho-positronium components (s 3 , I 3 ) were used to estimate the nanoscale free-volume hole size (V f ) and the free-volume fraction (f %). The free-volume hole size and its fractions depended on the addition of solvents and metals to the polymer.

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Analytical and electrical studies on poly(2-vinylpyridine) and its metal complexes

Cited by 14 publications

References 20 publications

Thermal behavior and electrical conductivity of poly(vinyl pyridine)/copper complexes

Thermal behavior and electrical conductivity of poly(vinyl pyridine)/copper complexes

Effect of doping polyacrylic acid with some dopants as studied by different techniques

Effects of some solvents on the thermal and free‐volume properties of poly(4‐vinylpyridine) complexes

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