Volume 134, Issue 29 44936
Article

Detailed examination of nitrile stretching vibrations relevant for understanding the behavior of thermally treated polyacrylonitrile

Klaus Ruhland

Corresponding Author

Klaus Ruhland

Materials Resource Management Institute, University of Augsburg, Universitätsstrasse 1, D-86159 Augsburg, Germany

Correspondence to: K. Ruhland (E-mail: [email protected])Search for more papers by this author
Nino Haase

Nino Haase

Materials Resource Management Institute, University of Augsburg, Universitätsstrasse 1, D-86159 Augsburg, Germany

Search for more papers by this author
Andreas Fischer

Andreas Fischer

Chemische Physik und Materialwissenschaften, University of Augsburg, Universitätsstrasse 1, D-86159 Augsburg, Germany

Search for more papers by this author
First published: 28 March 2017
Citations: 7

ABSTRACT

The influence of electronic and environmental effects on the wave number of nitrile stretching vibrations was examined with respect to moieties relevant for the polyacrylonitrile homopolymer and its assumed transformation products on thermal treatment in the course of carbon fiber production on the basis of four sources of information. Literature values were collected. Fourier transform infrared (FTIR) measurements on relevant commercially available compounds were performed. For the first time, model compounds were synthesized and examined, and for the first time, density functional theory calculations for unavailable important compounds were performed. The results place the interpretation of the FTIR data on much safer scientific ground than any other study before; in particular, they unequivocally disprove suggestions given in the previous literature and provide quantitative relative oscillation strengths for important peaks necessary for the quantitative kinetic evaluation of the changes, which will enable the systematic fine-tuning of new proposals. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44936.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.