Eigenvectors of the polyethylene chain with conformational defects calculated semianalytically by Green's function

Eigenvectors of vibrating polyethylene chains with (200) and (110) folds have been calculated by solving the phonon-scattering problem exactly with the method of Green's function. The results are applied to analyze the resonance modes of the (200) fold (ggtgg: 1353, 1356, 1374 cm^–1) and the (110) fold (approximately ggggtg: 820, 1288, 1342, 1348, 1372, 1374 cm^–1) in terms of the characteristic vibrations of smaller subunits of the (200) fold (gg, gtg) and the (110) fold (ggggtg, gggg, gtg) which can be identified spectroscopcally.Dedicated to Prof. Dr. W. Pechhold on the occasion of his 60th birthday