On shock loading solvent evaporation segregating due to surface oxidation indicates lower cross-linking with a higher mobility of the polyurethane chains. SEM micrographs show the formation of fine spherical carbon particles on PU due to melting and re-organization of surface. XPS results indicate the change in surface composition of polyurethane before and after exposure to shock in presence of oxygen. Deconvolved spectra of C (Is) show increased peak intensity of oxides formed during shock interaction. The optical micrographs show the dependency of surface morphology with temperature of the shock heated test gases.
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