Structure of the tie chains in oriented polyethylene: dependence of all-trans stem lengths on draw ratio

By the Raman LAM experiments the length distributions of straight all-trans sequences were obtained for oriented polymers films of varied draw ratios lambda. A shape of distribution function depended on lambda and draw temperature as well: the higher lambda the more long trans-stems could be observed in the oriented material. The experimental facts were matched to the results of the computer structure simulation based on 'stencil crystallization' model which was described previously(1). Large deviation of experimental data from theoretical ones is discussed briefly. In essence, this deviation may be considered as a measure of superstructure imperfection of a real oriented polymer. (C) 1997 Elsevier Science Ltd.