Accession Number : AD0686699

Title :   THE BIREFRINGENCE AND DICHROISM OF RUBBERY COPOLYMERS.

Descriptive Note : Doctoral thesis,

Corporate Author : MASSACHUSETTS UNIV AMHERST POLYMER RESEARCH INST

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

Report Date : MAR 1969

Pagination or Media Count : 54

Abstract : The Kuhn-Grun theory for the birefringence and dichroism of rubbery polymers is extended to the case of copolymers consisting of two or more statistical segments of differing lengths. It is shown that the previous equations are applicable provided that the anisotropy of polarizabilities and absorptions are replaced with suitable averages in which the segment anisotropies are weighted by the squares of their lengths. This indicates that the stress-optical coefficient will not generally vary linearly with composition. The orientation measured from the dichroism of bands arising from different segments will be different. (Author)

Descriptors :   (*BIREFRINGENCE, *POLYMERS), ELASTOMERS, POLARIZATION, ANISOTROPY, OPTICAL PROPERTIES, THESES

Subject Categories : Physical Chemistry
      Plastics
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE