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
Elastomers and Rubber
Distribution Statement : APPROVED FOR PUBLIC RELEASE