Networks and blends of polyaniline and polyurethane: correlations between composition and thermal, dynamic mechanical and electrical properties

Rodrigues, Paula C.; Akcelrud, Leni

doi:10.1016/j.polymer.2003.08.024

Cited by 65 publications

(42 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…19 In the literature 13 we found that the electric conductivity of POMA film on a glass sheet, doped by p-toluene sulfonic acid (TSA) obtained from different solvent, is in the order of 10 À3 S/cm as found in our blend. To free-standing POMA films obtained from 1-methyl-2-pyrrolidine (NMP) casting solution, doped in HCl solution the conductivity is around 1.3 S/cm three orders of magnitude higher than what is found in this work.…”

Section: à5supporting

confidence: 57%

See 1 more Smart Citation

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

Alves

Kanda

Malmonge

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

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.

show abstract

Section: à5supporting

confidence: 57%

“…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

View full text Add to dashboard Cite

show abstract

“…It was found that as the percent loading of PNA in the composites increased, their electrical conductivity values also increased; however, these values fell in the semi-conducting range, which was much higher relative to the conductivity values obtained with very high loading of PNA in previously reported composites. The improved electrical conductivity values of LFADU/PNA composites can be correlated to the hydrogen bonding and urea type linkages formed between the two polymers, which provide the path to charge conduction [40,41]. …”

Section: P U C O M P O S I T E S W E R E P R E P a R E D B Y T H E D mentioning

confidence: 99%

Seed Oil Based Polyurethanes: An Insight

Sharmin¹,

Zafar²,

Ahmad³

2012

Polyurethane

View full text Add to dashboard Cite

“…Initially, a weak loss of gradual mass less than 10% between 80 and 140 C was observed which corresponds to the physical absorbed water. 30 On the other hand, there is an important fall of the mass of approximately 40% for temperatures between 140 and 420 C. This can be due to the detachment of oligomers and doping agent from the PANI-DBTA. It is remarkable that more than 50% of the initial mass is preserved for temperatures up to 500 C. This residual mass corresponds to the presence of reticule polymer which is formed at high temperatures.…”

Section: Thermogravimetry Analysis (Tga)mentioning

confidence: 99%

Influence of Dibenzoyl Tartaric Acid on the Electrical Performances of the Polyaniline

et al. 2009

View full text Add to dashboard Cite

In this study, the dibenzoyl-L-tartaric acid (DBTA) was used as doping agent to synthesis polyaniline (PANI) by direct oxidative polymerization of a chiral aniline monomer repeat unit. The influence of DBTA on the electrical performances of the polyaniline was studied with the synthesis conditions, particularly the molar ratio of DBTA to aniline and the presence of methanol. The spectral characterization (FT-IR and UV-visible-NIR), the thermal (TGA), electrical properties at macroscopic scale (I-V, C-V curves and the gap) and the morphology of the PANI have been investigated. From the results it's found that synthetic conditions have a great influence on the electrical properties of PANI-DBTA. In addition polyaniline micro-fibres can be obtained when using methanol as a solvent of DBTA. [11][12][13][14][15] and circular polarized electroluminescence (CPEL). [16][17][18] This kind of polymer had the easier ability to give oxidizing and reducing states with colour changes, and the possibility to exchange the physicochemical characteristics with the temperature, pH, and the electric potential. Currently, chiral polyaniline is studied in the literature by different methods like the enantio-selective electropolymerisation of aniline in the presence of (1S) by direct oxidative polymerization of a chiral unit of aniline monomer 22 and by an enzymatic method for production of optically active polyaniline. 23 In the literature it's confirmed that the electronic properties of PANI depends on the degree of protonation and the method of synthesis. 24 Moreover, the work carried out on polyaniline doped by DBTA is based only on the optical properties, 25,26 where the majority of works gave the electric properties of the chiral polyaniline by using an acid containing a sulphonic function and according to Zhang et al.,27 it was reported that the variation of the concentration of the doping agent influences the electric and optical properties of the polyaniline.The aim of this work is to study the electrical behaviour of the polyaniline doped by a chiral acid containing a carboxylic function. The polyaniline was synthesised by direct oxidative polymerization of aniline monomer repeat unit using dibenzoyl tartaric acid (DBTA) as a dopant. The morphology, thermal, spectroscopic and electrical properties of PANI-DBTA were investigated.The DBTA has been chosen here because it has two asymmetrical carbons which confer an optical activity of the polarization plan for the monochromatic light. The optical rotation of DBTA measured in our laboratory at 20 C is À107to À113 in methanol. EXPERIMENTAL ProductsThe products used in this work such as Methanol 99.8%, Aniline 99%, DBTA 99%, ethanol 96%, chloroform 99% are from FLUKA and ammonium peroxydisulfate 99% is from PROLABO. They were all used without purification. Synthesis of PANI-DBTAThe PANI was synthesized by chemical oxidation of aniline, with the ammonium persulfate {(NH 4 ) 2 S 2 O 8 } as oxidant and the (2, 3) di-benzoyl-L-tartarique acid (DBTA) as dopant.In a glass reactor with ...

show abstract

Networks and blends of polyaniline and polyurethane: correlations between composition and thermal, dynamic mechanical and electrical properties

Cited by 65 publications

References 34 publications

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

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

Seed Oil Based Polyurethanes: An Insight

Influence of Dibenzoyl Tartaric Acid on the Electrical Performances of the Polyaniline

Contact Info

Product

Resources

About