SYMPOSIA PAPER Published: 01 January 1992

Mechanical Properties of Amorphous and Roll-Drawn Polypropylene


Mechanical properties of both amorphous polypropylene and roll-drawn polypropylene sheet are examined using four experimental techniques: creep, transverse vibrating cantilever beam, axially resonating rod, and ultrasonic time-of-flight. Variations of the principal dynamic moduli were determined over 14 decades of frequency, at a single temperature. The ultrasonic time-of-flight technique yielded the dynamic and shear moduli at 5 MHz for all three principal axes of the roll-drawn sheet; the results indicated the material to be transversely isotropic. The three-dimensional stiffness matrix was populated at 5 MHz; its two-dimensional counterpart was then compared to the 0.01 Hz stiffness matrix of Sinclair and McCammond.

Author Information

McCammond, D
University of Toronto, Toronto, Canada
Sinclair, AN
University of Toronto, Toronto, Canada
Sinclair, LA
University of Toronto, Toronto, Canada
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Developed by Committee: E08
Pages: 151–170
DOI: 10.1520/STP15346S
ISBN-EB: 978-0-8031-5212-0
ISBN-13: 978-0-8031-1444-9