Pyrolysis mass spectrometry analyses of poly(3-methylthiophene)

Date

2005-01-01

Author

Gozet, Tuba
Hacaloğlu, Jale

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

196
views

0
downloads

In this work, pyrolysis mass spectrometry techniques were applied to investigate the thermal and the structural characteristics of electrochemically prepared BF4- doped poly(3-methylthiophene) (PMTh) and to explore the effect of methyl substitution on thermal and structural characteristics of polythiophene (PTh). It has been determined that thermal degradation of BF4- doped PMTh films occurs in two steps as in the case of polythiophene. The first step was assigned to the loss of the dopant, and the second step to the degradation of the polymer backbone producing segments of various conjugation lengths. Detection of H2S, C3H4, and C2H2 in the final stage of pyrolysis was again associated with a network structure. Significant decrease in the relative intensities of dopant-based products indicated decrease in extent of doping. However, as dopant-based products of PMTh appeared at slightly higher temperatures, a stronger interaction between the dopant and the host polymer PMTh may be proposed. Decomposition of polymer during dedoping pointed out that electrochemical reversibility of the transition between the doped and undoped states is limited for PMTh.

Subject Keywords

Poly(3-methylthiophene), Conducting polymer, Pyrolysis mass spectrometry, Thermal degradation

URI

https://hdl.handle.net/11511/30947

Journal

Journal of Analytical and Applied Pyrolysis

DOI

https://doi.org/10.1016/j.jaap.2005.02.003

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Investigation of the effect of dopant on characteristics of poly(3-methyl thiophene) via pyrolysis mass spectrometry Gözet, Tuba; Önal, Ahmet Muhtar; Hacaloğlu, Jale (2007-03-01) In this work, a direct insertion probe pyrolysis mass spectrometry technique was applied to investigate the thermal and the structural characteristics of electrochemically prepared PF6- and BF4- doped poly(3-methylthiophene) (PMTh) to explore the effect of dopant on thermal and structural characteristics. It has been determined that the thermal degradation of PMTh occurs in two steps as in the case of polythiophene, (PTh). The first step was assigned to the loss of the dopant, and the second step to the deg...
Pyrolysis mass spectrometry analysis of BF4 - doped polythiophene Gozet, Tuba; Hacaloğlu, Jale; Önal, Ahmet Muhtar (2004-06-01) Pyrolysis of electrochemically prepared BF4- doped polythiophene (PTh) by direct insertion probe and Currie point pyrolysis gas chromatography mass spectrometry techniques indicated that thermal decomposition of PTh occurs in two steps. In accordance with literature results, the first step is assigned to the loss of the dopant, and the second step to the degradation of the polymer backbone producing segments of various conjugation lengths. At elevated temperatures, detection of products such as H2S and C2H2...
Characterization of polyaniline via pyrolysis mass spectrometry Hacaloğlu, Jale; Kücükyavuz, Zühal (2008-04-05) In this work, direct insertion probe pyrolysis mass spectrometry technique was applied to investigate the thermal and the structural characteristics of electrochemically prepared HCl and HNO3-doped polyaniline (PANI) films. It has been determined that the thermal degradation of both samples showed three main thermal degradation stages. The first stage around 50-60 degrees C was associated with evolution of solvent and low-molecular-weight species adsorbed on the polymer, the second stage just above 150 degr...
Pyrolysis mass spectrometry analysis of thiophene capped poly(methyl methacrylate) and poly(methylthienyl methacrylate) Hacaloğlu, Jale; Toppare, Levent Kamil (2003-06-01) The thermal degradations of thiophene-capped poly(methyl methacrylate) and poly(methylthienyl methacrylate) were studied via direct pyrolysis mass spectrometry. No significant effect of heating rate on the thermal degradation behaviors of the polymers under investigation have been observed in the heating range studied. It has been determined that thermal degradation of thiophene-capped poly(methyl methacrylate), (TPMMA) mainly yields monomer as in the case of pristine poly(methyl methacrylate). An analogous...
A pyrolysis mass spectrometry study of polythiophene - Natural rubber and polythiophene - Synthetic rubber conducting polymer composites Yigit, S.; Hacaloğlu, Jale; Akbulut, Ural; Toppare, Levent Kamil (1997-01-01) The thermal behaviors and degradation products of conducting polymer composites prepared by electrooxidation of thiophene using natural rubber or synthetic rubber as the insulating matrix were studied by direct and indirect mass spectrometry techniques. The pyrolysis mass data revealed that a chemical interaction formed between the components of the composites during polymerization. Thermal characteristics of rubbers totally disappeared in the composites indicating presence of some chain scissions leading t...

Citation Formats

T. Gozet and J. Hacaloğlu, “Pyrolysis mass spectrometry analyses of poly(3-methylthiophene),” Journal of Analytical and Applied Pyrolysis, pp. 257–262, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30947.