Accession Number : AD0618999

Title :   MECHANICAL SHEAR RELAXATION SPECTROSCOPY IN EXPERIMENTAL VISCOELASTICITY,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF LOCKHEED PALO ALTO RESEARCH LAB

Personal Author(s) : Miles,D. O. ; Knollman,G. C. ; Hamamoto,A. S. ; Norstrom,G. C.

Report Date : 11 NOV 1964

Pagination or Media Count : 17

Abstract : The applicability of experimental viscoelastic techniques involving sinusoidal mechanical shear is examined for several types of rheological systems. Data are first presented for NBS polyisobutylene to establish validity for the approach used. General categories that are investigated include elastomers, filled systems, pure liquids, slurries, or suspensions, solutions and gels, foodstuffs, and polymer melts. A modification of the familiar time-temperature superposition routine is proposed by which both entropy and energy relaxation processes can be treated for liquids and polymers alike. (Author)

Descriptors :   (*VISCOELASTICITY, SPECTROSCOPY), (*POLYMERS, VISCOELASTICITY), (*LIQUIDS, VISCOELASTICITY), POLYETHYLENE PLASTICS, ELASTOMERS, COMPOSITE MATERIALS, COLLOIDS, SOLUTIONS(MIXTURES), FOOD, ULTRASONIC RADIATION, SHEAR STRESSES, RELAXATION TIME, ENTROPY

Distribution Statement : APPROVED FOR PUBLIC RELEASE