Accession Number:

AD0754391

Title:

Ultrasonic Relaxation Near the Melting Point of Polyethylene and Polyethylene Oxide,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

• Hartmann,Bruce
• Jarzynski,Jacek

Report Date:

1972-10-26

Pagination or Media Count:

14.0

Abstract:

Ultrasonic absorption measurements were made on polyethylene and polyethylene oxide at 5.5 MHz from room temperature to above the melting point. Both polymers have a relaxation peak near the melting point. Comparison of this data with literature values suggests that both peaks are due to the alpha relaxation, and that the activation energy for the alpha relaxation in polyethylene oxide is 40 kcalmole. Author-PL

Descriptors:

• (*POLYETHYLENE PLASTICS
• ULTRASONIC PROPERTIES)
• RELAXATION TIME
• ULTRASONIC RADIATION
• ABSORPTION
• HEAT OF ACTIVATION
• THESES

Subject Categories:

• Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE