Polyaniline/polyurethane networks. II. A spectroscopic study

Rodrigues, Paula C.; Lisboa‐Filho, Paulo Noronha; Mangrich, Antônio S.; Akcelrud, Leni

doi:10.1016/j.polymer.2005.01.020

Cited by 47 publications

(36 citation statements)

References 37 publications

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“…The strong tendency of PANI and PU to form hydrogen bonding has been verified by Rodrigues et al through various spectroscopic techniques, which was believed to be responsible for a certain degree of phase mixing in PANI/PU blend [43] . Ma et al (2009) also confirmed the hydrogen bonding between PANI and PU, and the strong hydrogen bonding in the blend contributed to better miscibility, higher conductivity and tensile strength [44] .…”

Section: Ftir Analysesmentioning

confidence: 78%

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

2014

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Abstract:The polyurethane (PU)/polyaniline (PANI) IPN, at three composition ratios (95/05, 75/25, 60/40), were analyzed, after the action of the urease enzyme, by means of the Hyperchem 8v software. Theoretical analysis of Gibbs free energy, FTIR, and 13 C-NMR were done. The generation of functional groups due to hydrolysis was analyzed by FTIR. The 13 C-NMR spectra of the three ratios showed a superposition of the individual spectra of PU and PANI and an appreciable decrease of the signals due to the action of the urease enzyme. The orbits showed that the electron density of the HOMO (Highest Occupied Molecular Orbital) is predominantly localized on the C-C bond, indicating that the binding of PU/PANI with the urease enzyme contains a vacant d-orbital. It is concluded that the adsorption of the urease enzyme increases the degree of hydrolysis of the IPN.

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Section: Ftir Analysesmentioning

confidence: 78%

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

2014

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“…The same result was reported recently in the literature for NCO terminated PU and PANI emeraldine base. 19,20 The UV-Vis-NIR absorption spectra of undoped PU/POMA and PU/POMA doped with 1.0M HCl is shown in Figure 6. The films were obtained on the glass substrate by casting and doped by immersion in 1.0M HCl aqueous solutions.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of castor oil‐based polyurethane/poly(o‐methoxyaniline) blend film

Alves

Kanda

Malmonge

et al. 2007

J of Applied Polymer Sci

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Blends made up of castor oil-based polyurethane (PU) and poly(o-methoxyaniline) (POMA) were obtained in the form of films by casting and characterized by FTIR, UV-Vis-NIR spectroscopy, and electrical conductivity measurements. Doping was carried out by immersing the films in 1.0M HCl aqueous solution. Chemical bonds between NCO group of PU and NH group of POMA were observed by means of FTIR spectra. The UVVis-NIR spectra indicated that the presence of the PU in the blend does not affect doping and formation of the POMA phase. The electrical conductivity research was in the range of 10 À3 S/cm.

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“…The FTIR spectra of composites, PANI and PUSA were recorded in Perkin Elmer (USA) TXI FTIR spectrometer in the range 4000-400 cm 21 . FTIR spectrum of PANI was recorded in the form of KBr pellet while those of PUSA and composites were recorded in the form of thin films.…”

Section: Synthesis Of Pani Emeraldinementioning

confidence: 99%

“…Optically active core-shell PU-PANI composites with a PU-core and PANI-shell were synthesized by an electrochemical method. 19 Rodrigues et al 20,21 attempted to enhance the compatibility between PU and PANI through interpenetrating polymer networks. The synthesis of composites from carboxylated PU grafted with PANI was investigated by Abbati et al 22 Blends of PU and PANI-DBSA dispersions were studied by Kwon et al 23 for their dynamic, mechanical, electrical and antistatic properties.…”

Section: Introductionmentioning

confidence: 99%

Conductive composites from polyaniline and polyurethane sulphonate anionomer

Deka

Bora

Upadhyaya

et al. 2014

J of Applied Polymer Sci

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The present work describes the synthesis of conductive composite of polyurethane sulphonate anionomer (PUSA) and para toluene sulphonic acid doped polyaniline (PANI-PTSA). HCl-doped PANI was synthesized by chemical oxidative polymerization of aniline in HCl, which was converted to PANI-EB by treatment with NH 4 OH. PTSA doped PANI was synthesized from EB-PANI by redoping with PTSA solution. PUSA was synthesized from 4, 4 0 -diphenylmethanediisocyanate (MDI), polypropylene glycol (PPG), 1,4-butanediol (BD), and ionic diol SDOL. The composite was prepared by mixing of the solutions of two polymer components in DMF and then solution casting. The products were characterized and analyzed by UV-Vis and FTIR spectroscopy, thermogravimetry, differential scanning calorimetry and scanning electron microscopy. The conductivity was found to increase by 100 times with concomitant decrease in percolation threshold when polyurethane was replaced by PUSA in the composite for the same amount of polyaniline. The composite film was thermally stable upto 300

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Polyaniline/polyurethane networks. II. A spectroscopic study

Cited by 47 publications

References 37 publications

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

Preparation and characterization of castor oil‐based polyurethane/poly(o‐methoxyaniline) blend film

Conductive composites from polyaniline and polyurethane sulphonate anionomer

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