VIBRATION DAMPING SPECTROSCOPY

Farrer RA, Loughnane BJ, Deschenes LA, Fourkas IT. Level-dependent damping in intermolecular vibrations linear spectroscopy. I Chem Phys 1997 106 6901-6915. 

The morphology of IPNs has been widely investigated via electron microscopy and dynamical mechanical spectroscopy. Many IPNs have dual-phase continuity, with phase domain sizes of the order of several hundred angstroms. For sound and vibration damping over broad temperature ranges, the two polymers are mixed in different extents in different parts of the material, usually in the submicron range. 

From the experimental findings discussed in Sect. 5.4.1, it seems that a complete spectroscopy of = 0" bands is possible in the regions of vibrational damping. In order to check this completeness and the consistency of the observed level density with the excitation energy in... 

For s = 0 and for s - as, the interferogram given by Eq. (A 1.2) exhibits the properties quoted in Section 3.2. The functions I (v) and I (s) are a Fourier transform pair well known from the theory of forced vibrations and resonance of damped oscillators. One reason why they are very useful to demonstrate problems of Fourier transform spectroscopy is that the different contributions to I v) and to I (s) can be studied separately (cf. Fig. 12). 

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