Accession Number:

AD0748827

Title:

Estimation of Shelf Life of Unstabilized Polyolefins from Thermal Oxidation Data

Descriptive Note:

Techical memo.

Corporate Author:

PICATINNY ARSENAL DOVER NJ

Personal Author(s):

• Reich, Leo

Report Date:

1972-09-01

Pagination or Media Count:

35.0

Abstract:

Utilizing carbonyl formation data previously obtained during the thermal oxidation of unstabilized atactic polypropylene, unstabilized isotactic polypropylene and unstabilized atactic polybutene-1 along with a semi-empirical expression, it was possible to extrapolate and obtain arbitrary induction times at relatively low temperatures. Values of induction times thus obtained were correlated with changes in physical properties, i.e., intrinsic viscosity and the product of ultimate elongation and ultimate tensile strength a product which is often referred to as the impact index.

Descriptors:

• *POLYMERS
• *DECOMPOSITION
• PHYSICAL PROPERTIES
• TENSILE PROPERTIES
• THERMAL STABILITY
• KETONES
• STORAGE
• CORRELATION TECHNIQUES
• VISCOSITY
• ELONGATION
• DEGRADATION
• AGING(MATERIALS)
• OXIDATION

Subject Categories:

• Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE