# Primary Pyrolysis Products of Hydroxy-Terminated Polybutadiene

Ganesh, K and Sundarrajan, S and Kishore, K and Ninan, KN and George, B and Surianarayanan, M (2000) Primary Pyrolysis Products of Hydroxy-Terminated Polybutadiene. In: Macromolecules, 33 (2). pp. 326-330.

 PDF ma990423p.pdf - Published Version Restricted to Registered users only Download (96Kb) | Request a copy

## Abstract

This is the first report on the analysis of primary degradation products of a widely used commercial propellant binder, viz. hydroxy-terminated polybutadiene (HTPB), which has been carried out by direct pyrolysis mass spectrometry. The mechanism of degradation involves a radical process forming cyclic compounds as well as $\beta-CH$ transfer reactions to form linear oligomers. On the basis of heats of formation data, it was found that the formation of 1,3-butadiene monomer is not favored during the primary chain scission process. However, its formation appears to emanate from the dissociation of high molecular weight cyclics/linear oligomers. In the presence of strong oxidizers such as ammonium perchlorate, the degradation pattern of HTPB, as observed in pyrolysis-gas chromatography/mass spectrometry analysis, is significantly affected, indicating its influence on HTPB degradation.

Item Type: Journal Article Copyright of this article belongs to American Chemical Society. Division of Chemical Sciences > Inorganic & Physical Chemistry 07 Oct 2008 06:08 19 Sep 2010 04:51 http://eprints.iisc.ernet.in/id/eprint/16267