The birefringence of thin films of poly(1-trimethylsilylpropyne) with 55 : 45 ratio of units with transand cisconfigurations of the -C = C- bonds was studied by the method of an oblique polarized beam. The surface birefringence coefficients were determined for films of various thicknesses. A theory of birefringence in the surface layers of polymer films was suggested, based on the assumed exponential decrease in the orientation order parameters of the molecular chain fragments with increasing distance from the film surface.
Russian Journal of Applied Chemistry – Springer Journals
Published: Oct 3, 2004
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