Raman and Rayleigh scattering study of crystalline polyoxyethyleneglycols by M. Kozielski, M. Mühle, Z. B³aszczak, and M. Szybowicz

Crystal Research and Technology

Cryst. Res. Technol. 40, 466 (2005) - Abstract -

Raman and Rayleigh scattering study of crystalline polyoxyethyleneglycols

M. Kozielski, M. Mühle, Z. B³aszczak*, and M. Szybowicz

Faculty of Technical Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznañ, Poland
*Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznañ, Poland

Keywords	Raman, Rayleigh scattering, conformational properties, polyoxyethylenoglycol
PACS	78.30.Jw
DOI	10.1002/crat.200410368

Results of the study of Raman and Rayleigh scattering in crystalline polyoxyethyleneglycols (PEG) and PEG 1500 aqueous solution are reported. The conformational changes of the polymer chain have been studied as a function of PEG water solution concentration and molecular weight. Intensity ratios of the gauche and trans conformation around C–C and C–O bonds have been estimated from the Raman spectra. Moreover, from the Raman band parameters the values of the order parameters versus aqueous solution concentration have been determined. The influence of an external electric field on these parameters has been analysed. Mutual orientation of polyoxyethyleneglycol chains in the crystalline and liquid state has been studied on the basis of the angular correlation parameters obtained from the Rayleigh band intensity as a function of aqueous solution concentration and molecular weight.

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