Pyrolysis mass spectrometry analysis of electrochemically grafted polyacrylonitrile with thiophene

Date

2005-10-01

Author

Oguz, Gulcan
Hacaloğlu, Jale
Önal, Ahmet Muhtar

Metadata

Show full item record

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

Item Usage Stats

218
views

0
downloads

In this work, structural and thermal analyses of a polythiophene/polyacrylonitrile (PTh/PAN) sample, prepared by electrochemical polymerization of thiophene onto a poly(acrylonitrile) coated anode, have been performed by a direct insertion probe pyrolysis mass spectrometry technique. The evolution profiles of PTh based products from PTh/PAN showed nearly identical trends with those recorded during the pyrolysis of pure PTh. However, when PAN based products were considered, contrary to the trends observed for pure PAN, evolution of HCN and the degradation products due to the homolytic cleavages of the polymer backbone continued throughout the pyrolysis indicating a significant increase in their production even at the final stages of pyrolysis. On the other hand, the yield of thermal degradation products associated with decomposition of the unsaturated cyclic imine segments decreased. A careful analysis of the data pointed out the presence of mixed dimers. Yet, because of the possible contributions of various products to the corresponding peaks, a copolymer formation cannot be confirmed.

Subject Keywords

Conducting polymers, Copolymers polythiophene, Polyacrylonitrile, Pyrolysis

URI

https://hdl.handle.net/11511/32613

Journal

Journal of Macromolecular Science - Pure and Applied Chemistry

DOI

https://doi.org/10.1080/10601320500205665

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Thermal analysis of a new thiophene derivative and its copolymer Aslan, E.; Toppare, Levent Kamil; Hacaloğlu, Jale (2008-06-01) Thermal characteristics of a new thiophene derivative, 2-(thiophen-3-yl-)ethyl octanoate (OTE), its homopolymer (POTE), and copolymer with thiophene P(OTE-co-Th) were investigated via pyrolysis mass spectrometry. Thermal degradation of the copolymer started by lose of side chains and thiophene involving products evolved almost in the same temperature range where PTh degradation was detected, at slightly higher temperatures than PTh backbone decomposed during the pyrolysis of POTE. The extent of doping and n...
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...
Pyrolysis mass spectrometric analysis of copolymer of polyacrylonitrile and polythiophene Oğuz, Gülcan; Hacaloğlu, Jale; Department of Polymer Science and Technology (2004) In the first part of this work, the structural and thermal characteristics of polyacrylonitrile, polyacrylonitrile films treated under the electrolysis conditions in the absence of thiophene, polythiophene and the mechanical mixture and a conducting copolymer of polyacrylonitrile/polythiophene have been studied by pyrolysis mass spectrometry technique. The thermal degradation of polyacrylonitrile occurs in three steps; evolution of HCN, monomer, low molecular weight oligomers due to random chain cleavages a...
Characterization of conducting copolymer of thiophene via pyrolysis mass spectrometry Levent, Anil; Hacaloğlu, Jale; Toppare, Levent Kamil (2005-12-01) In this work, structural and thermal characterization of a conducting copolymer of thiophene (PTh) with 2-methylbutyl-2-(3-thienyl)acetate prepared by two different methods has been performed by pyrolysis mass spectrometry techniques. The pyrolysis mass spectrometry data of both components of the copolymer, polythiophene, PTh, poly(2-methylbutyl-2-(3-thienyl)acetate), PMBTA and PTh/PMBTA have been analyzed and compared. It has been determined that when the electrochemical polymerization of thiophene was ach...
Thermal decomposition of glycidyl azide polymer by direct insertion probe mass spectrometry Fazlioǧlu, Hatice; Hacaloğlu, Jale (2002-01-01) Thermal decomposition reactions and products of glycidyl azide polymer (GAP), have been investigated by direct insertion mass spectrometry and evolved gas analyses by FTIR spectroscopy techniques. It has been observed that thermal degradation of GAP begins with cleavage of the side groups. Although the main decomposition started with the elimination of molecular nitrogen from the azide functional group, degradation initiated by loss of N-3 and CH2N3, depolymerization type reactions were also identified. Rea...

Citation Formats

G. Oguz, J. Hacaloğlu, and A. M. Önal, “Pyrolysis mass spectrometry analysis of electrochemically grafted polyacrylonitrile with thiophene,” Journal of Macromolecular Science - Pure and Applied Chemistry, pp. 1387–1397, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32613.