ACOUSTIC PROPERTIES OF POLYETHYLENE NEAR THE MELTING POINT.
NAVAL ORDNANCE LAB WHITE OAK MD
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Ultrasonic absorption and velocity measurements were made on high density polyethylene to above the melting point. The measurements were done at 53 kHz and showed a maximum in absorption in excess of 10 dbcm above the room temperature absorption. A simple two state theoretical model crystalline and amorphous correctly predicted the shape of the absorption curve but not the magnitude of the peak. Author
- Solid State Physics