Accession Number : AD0430189

Title :   THE TRANSMISSION OF CRYSTAL AGGREGATES BETWEEN POLARIZERS,

Corporate Author : MASSACHUSETTS UNIV AMHERST POLYMER RESEARCH INST

Personal Author(s) : Stein,R. S. ; clough,S.K

Report Date : 26 NOV 1963

Pagination or Media Count : 25

Abstract : The presence of an optically anisotropic body between crossed polarizers generally results in the transmission of light. This has been used to study the rate of crystallization of spherulitic polymers. For the method to be applicable, it is necessary that the sample be thin and be examined in sufficiently early stages of crystallization so that spherulite overlap is negligible. Also, the sample must have no macroscopic orientation. All of the transmission should be a consequence of the presence of spherically or circularly symmetrical anisotropic bodies and should not result from any overall anisotropy. Also, the existing derivations are two dimensional in nature. It was desired in this investigation to study the kinetics of crystallization in oriented polymers. Assuming analysis of the results is possible, the light transmission method is a convenient means of following such crystallization. It is the purpose of this paper to analyze the transmission of light for an oriented polymer film between polaroids with their polarization directions set at an arbitrary angle. (Author)

Descriptors :   (*POLYMERS, LIGHT TRANSMISSION), (*CRYSTALS, POLARIZATION), ANISOTROPY, CRYSTALLIZATION, PARTIAL DIFFERENTIAL EQUATIONS, OPTICAL PROPERTIES, OPTICAL EQUIPMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE