Orientation of Anthracene in Stretched Polyvinylchloride

Dichroic measurements were made of anthracene in polyvinylchloride films stretched at various degree of elongation. A band at 363 nm of anthracene shows parallel dichroism at small elongation, but perpendicular at large elongation. This change of dichroism wastheoretically interpreted. The results indicate that the long axis and the plane of the anthracene moleculeorients predominantly parallel to the stretching direction