Accession Number:

AD0276131

Title:

THE CALCULATION OF THE BIREFRINGENCE OF POLYBUTENE-1 CRYSTALS AND THE COMPUTER CALCULATION OF POLARIZABILITIES

Descriptive Note:

Technical rept.

Corporate Author:

MASSACHUSETTS UNIV AMHERST

Report Date:

1961-12-20

Pagination or Media Count:

28.0

Abstract:

The calculation of the polarizability of hydrocarbon molecules and the birefringence of polyolefin crystals has been the subject of a number of publications from this laboratory. These studies have cast some doubt on the principle of additivity of bond polarizabilities. To further examine the validity of this principle, the birefringence of crystals of polybutene-1 was calculated using both the Denbigh and the Bunn-Daubeny values of bond polarizability. These were compared with values obtained from the measurements of the birefringence of oriented polybutene films. Powers, J., Hoshino, J., Stein, R. S. ONR Tech. Rept. No. 38. Aug 1961. A computer program was developed for carrying out this calculation as well as the calculation of the depolarization ratio and principal polarizabilities of molecules. This was used to check some previously published results and some revised values are included. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE