Accession Number : AD0259528

Title :   SOME VISCOELASTIC PROPERTIES OF AMMINE SUBSTITUTED DICHLOROZINC POLYMERS

Corporate Author : PRINCETON UNIV N J FRICK CHEMICAL LAB

Personal Author(s) : EISENBERG,A. ; KATZ,D. ; TOBOLSKY,A.V.

Report Date : 31 DEC 1960

Pagination or Media Count : 1

Abstract : An attempt was made to determine the molecular weight, distribution of molecular weights, and the relaxation mechanism of monammine-dichlorozinc. The study of ammine substituted dichlorozincs included determinations of (1) glass transition temperatures; (2) modulus-temperature curves; and (3) maximum relaxation times as function of temperature. Glass transition temperatures were obtained by determining the weight of the samples in toluene as a function of temperature, the inflection point yielding transition temperature value. The results for ZnCl2.1/2NH3, ZnCl2.1 NH3, and ZnCl2.1 1/2 NH3 were close, the values varying between 6 to 11 + or -2. The modulustemperature curve of the monoammine sample was similar to that of polystyrene or inorganic polymers such as amorphous Se. No rubbery plateau was encountered. A preliminary calculation yielded the value of 30 monomer units for the monoammine on the basis of stress relaxation studies.

Descriptors :   *AMMINO COMPOUNDS, *POLYMERS, *ZINC COMPOUNDS, CHLORIDES, COMPLEX COMPOUNDS, ELASTIC PROPERTIES, MOLECULAR STRUCTURE, PHYSICAL PROPERTIES, RELAXATION TIME, TEMPERATURE, TRANSITION TEMPERATURE, VISCOSITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE