Accession Number : AD0255706

Title :   GROWTH OF CRYSTALS IN ORIENTED AMORPHOUS POLYETHYLENE

Descriptive Note : Technical rept.

Corporate Author : MASSACHUSETTS UNIV AMHERST

Personal Author(s) : JUDGE,JANE T. ; STEIN,RICHARD S.

Report Date : 15 APR 1961

Pagination or Media Count : 1

Abstract : The growth of crystals from the melt in oriented crosslinked polyethylene was studied by X-ray diffraction and birefringence as a function of orientation. It was found that for samples elongated more than about 200%, the crystals grow with their c-axes parallel to the stretching direction. At elongations less than 200%, there is a rather abrupt transition to a mode of growth in which the b-axis is perpendicular to the stretching direction with a tendency for the a-axis to be aligned parallel to this direction. (Author)

Descriptors :   *CRYSTAL STRUCTURE, *CRYSTALLIZATION, *ETHYLENES, *POLYMERS, COOLING, CRYSTAL LATTICES, CRYSTALS, GROWTH(PHYSIOLOGY), HEAT TREATMENT, HEATING, MOLECULAR STRUCTURE, NUCLEATION, PLASTICS, REFRACTIVE INDEX, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE