Accession Number:

AD0260422

Title:

IMPROVEMENT OF THERMOMECHANICAL TESTING OF POLYMERS THROUGH AUTOMATIC RECORDING

Descriptive Note:

Corporate Author:

LIBRARY OF CONGRESS WASHINGTON D C AEROSPACE TECHNOLOGY DIV

Personal Author(s):

Report Date:

1961-06-22

Pagination or Media Count:

1.0

Abstract:

The method of thermomechanical curves, used extensively in the USSR for determining mechanical properties of polymers at varying temperatures, is discussed. A fully automatic laboratory device has been constructed for recording the values of monoaxial compression of a polymer at gradually increased temperatures, while the polymer changes state from the glassy or vitreous to the highly elastic, and finally to the viscous-plastic. The points on the generally S-shaped thermomechanical curve representing these changes of state are the glss-transition point Tg and flow point Tf. In the new device monoaxial compression is produced by the pressure of an interchangeable load on the specimens while they are being subjected to temperature variations in the -120 to 400 C range. The dimensional changes are converted into electric signals and recorded continuously. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE