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Synthesis and Characterization of Novel Hydroxyl-Terminated N-N-Bonded Resins

Sridhara, K and Jain, SR (2001) Synthesis and Characterization of Novel Hydroxyl-Terminated N-N-Bonded Resins. In: Journal of Applied Polymer Science, 81 (13). 3204 -3211.

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Novel resins containing carbonyl or thiocarbonyl moiety; N-N bonds; ethereal linkage; and terminal hydroxyl groups, that is, bis(bisvanillincarbonohydrazone-4-oxy)butane 1,4-diyldiether and bis(bisvanillinthiocarbonohydrazone-4-oxy)butane 1,4-diyldiether, have been synthesized by condensing bisvanillincarbono- and bisvanillinthiocarbono-hydrazone, respectively, with 1,4-dibromobutane. The resins were characterized by elemental and hydroxyl equivalent analyses, infrared and $^1H$- and $^{13}C-NMR$ spectra, and other properties relevant to their use as propellant binders, such as calorific value, thermal analysis, viscosity, and burning rate measurements. Both these resins have convenient viscosity, indicating their suitability as binders for processing high solid loading, at slightly above room temperature. The resins could be cured easily with toluene diisocyanate and glycerol. The DTA-TG data show that the cured samples start to decompose exothermically at relatively low temperatures, in the range around 160°C. The resins ignite immediately on coming in contact with pure nitric acid, indicating their hypergolic nature. The burning rates of the ammonium perchlorate-based propellant compositions having these resins as binders are much higher than those processed with a conventional butadiene binder.

Item Type: Journal Article
Publication: Journal of Applied Polymer Science
Publisher: John Wiley and Sons
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 15 Mar 2007
Last Modified: 19 Sep 2010 04:36
URI: http://eprints.iisc.ac.in/id/eprint/10398

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