Accession Number : AD0486955

Title :   INVESTIGATION OF CREEP PHENOMENA IN POLYETHYLENE AND POLYPROPYLENE.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Edgemond, John W.

Report Date : MAY 1966

Pagination or Media Count : 46

Abstract : Although creep in thermoplastics has been investigated thoroughly, especially polyethylene, not too much information exists to establish activation energies at different stress levels by the application of high stress level, short time creep tests. Extrapolation of data to zero stress levels gives a true material activation energy which is a measure of internal resistance to deformation. Description of specific creep parameters and equipment with a relatively simple phototube recording device are offered along with a discussion of results and recommendations for future fields of investigation. (Author)

Descriptors :   *CREEP), (*POLYETHYLENE PLASTICS, CREEP), (*PROPENES, THERMOPLASTIC RESINS), (*THERMOPLASTIC RESINS, HEAT OF ACTIVATION, STRESSES, DEFORMATION, POLYMERS, STRAIN(MECHANICS).

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE