Extensional Flow of Bulk PolymersA study was made of the behavior of polyisobutylene under motion at a constant stretch history for both strip biaxial extensional flow and simple extensional flow. Steady-state non-Newtonian viscosities were observed at various constant stretch histories. Newtonian viscosities for both strip biaxial and simple extensional flow were found to be in agreement with the classical theory. The results of the study provide an essential part of the experimental background necessary for the development of a new general stress-strain-time relation for uncrosslinked and lightly crosslinked polymers.
Document ID
19730002259
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Peng, T. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)