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2 Polish Journal of Applied Chemistry

2 2009

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The vibration dynamics of a bisphenol a polycarbonate molecule-spectroskopic and theoretical research

Kulczycki A.

Polish Journal of Applied Chemistry

2009

Vol. 53, nr 3

231-238

An investigation of the vibration dynamics of a part of a polycarbonate moleculc was carried out. Infrared spectra in the far and the middle ranges were used to solve this problem. Infrared bands of out of plane modes were assigned. The research was important for analysis of conformation ordering of macromolccules.

Infrared temperature studies of the polyurethane-based membrane materials

Kaczmarczyk B., Wolińska-Grabczyk A., Jankowski A.

Polish Journal of Applied Chemistry

2009

Vol. 53, nr 2

135-139

The effcct of thermal annealing on hydrogen bonding in 4,4'-diaminodiphenylmethane-bascd segmented polyurethanes (PUU) varying in the length of the poly(tctramcthylcne oxide) (PTMO)-bascd soft segments has been studied by using Fourier transformed infrared spectroscopy (FTIR). It has been found that a significant amount of both interurcthanc and hard - soft segment hydrogen bonding exists in the investigated PUUs. The later one indicates some degree of phase mixing leading to the hard segments being mixed into the soft domains. The spectral evidence for temperature effects on the hydrogen bonding have been demonstrated, which is based on the significant changes in the relative intensities of the bands corresponding to the free and different hydrogen- bonded C=0 groups as a result of the thermal treatment.