Accession Number:

AD0257562

Title:

ORIENTATION STUDIES ON DRAWN POLYOLEFINS

Descriptive Note:

Technical rept.

Corporate Author:

MASSACHUSETTS UNIV AMHERST

Personal Author(s):

Report Date:

1961-05-22

Pagination or Media Count:

10.0

Abstract:

X-ray diffraction and birefringence data obtained indicate that quenched samples possess more orientation at a given elongation for both polyethylene and polypropylene films. Thus, the finer the texture and the lower the degree of crystallinity, the less the stress required to orient the polymer a given amount. Polyethylene film follows a 3 orientation process on cold drawing with the a-axis orienting perpendicular to the stretching direction twice as rapidly as the b-axis, as the c-axis is turned toward the stretching direction. Polypropylene film, on the other hand, shows random orientation of the a and b-axis about the c-axis as the c-axis is turned toward the stretching direction. This may be related to differing ease of crystal distortion between the two polymer systems. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE