FTIR Spectral Evaluation of Polyurethane Adhesive Bonds in Perspex Canopies of Aircraft

S.P. Panda; D.S. Sadafule

doi:10.14429/dsj.46.4073

S.P. Panda Institute of Armament Technology, Pune.
D.S. Sadafule Institute of Armament Technology, Pune.

DOI: https://doi.org/10.14429/dsj.46.4073

Keywords: Infrared spectral analysis, Fourier transform, Capron glue

Abstract

Failure of capron glue (polyurethane) adhesive joint between nylon strips and perspex canopy of aircraft has been studied by Fourier transform infrared spectral analysis. It is concluded that the brittle failure of the joint is due to time-dependent crosslinking of residual isocyanate group with residual hydroxyl or the amino groups produced as a results of reaction of absorbed moisture with the isocyanate moiety: A service life of eight years has been estimated for the glue joint.

Author Biographies

S.P. Panda, Institute of Armament Technology, Pune.

Dr SP Panda obtained his MSc in Organic Chemistry from Utkal University in 1963 and PhD in Polymer themistry from University of Poona, in 1975. He joined DRDO in 1967 and at present is the Chairman, Faculty of Explosives and Applied Chemistry at the Institute of Armament Technology (IAT), Pune. He has published about 69 research papers in national and international journals iin the fields of hypergolic rocket propellants, ram rocket propellants, photocurable polymers, ballistic composites and fast neutron activation analysis of explosives and polymers. He is an invited member of the New York Academy of Sciences, USA.

D.S. Sadafule, Institute of Armament Technology, Pune.

Mr DS Sadarule, Technical Officer (A) at IAT, obtained his BSc (hons) from University of Poona, in 1969 and joined IAT in the same year.