Accession Number : AD0657352

Title :   THE DICHROISM AND BIREFRINGENCE OF POLYMERS CONTAINING POLYENE SEGMENTS. PART I.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS UNIV AMHERST POLYMER RESEARCH INST

Personal Author(s) : Shindo,Y. ; Stein,R. S.

Report Date : JUL 1967

Pagination or Media Count : 25

Abstract : An extension of the Kuhn-Grun theory of birefringence of ideal rubbers is carried out where a distribution of statistical segment lengths is permitted. It is shown that at a given elongation, longer statistical segments will be oriented more highly than shorter ones. The application of the model to the dichroism of rubber-like networks is discussed. It is shown that the dichroism measurement may give a different measure of orientation than birefringence since it may arise from certain segments of the chain which are of different length from those contributing to birefringence. (Author)

Descriptors :   (*POLYMERS, OPTICAL PROPERTIES), MOLECULAR STRUCTURE, STATISTICAL DISTRIBUTIONS, ELASTOMERS, ELONGATION, POLARIZATION, ABSORPTION SPECTRA, REFRACTIVE INDEX, REFRACTION

Subject Categories : Elastomers and Rubber
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE