Accession Number : AD0277406

Title :   THE LOW ANGLE LIGHT SCATTERING OF POLYTETRA-FLUOROETHYLENE FILMS

Corporate Author : MASSACHUSETTS UNIV AMHERST POLYMER RESEARCH INST

Personal Author(s) : RHODES,MARION B. ; STEIN,RICHARD S.

Report Date : 24 MAY 1962

Pagination or Media Count : 1

Abstract : Low-angle light scattering patterns from polyethylene and polytetrafluoroethylene (PTFE) using V sub v polarization (parallel polarization and analyzer) and H sub v polarization (crossed polarizer and analyzer) are presented. The difference in appearance is evident and is interpretable in terms of morphological differences between these 2 polymers. Attempts are made to interpret the PTFE scattering pattern and relate it to the known morphology of PTFE. Experimental evidence indicated that the scattering entities are aggregates of the crystals in which the crystals are arrayed at a preferred angle with respect to the direction of maximum extension of the aggregate. Patterns obtained with stretched PTFE films are consistent with the orientation of the aggregate with its longest dimension lying along the stretching direction accompanied by a decrease in the angle between the aggregate axis and the principal polarizability direction.

Descriptors :   *ETHYLENES, *FILMS, *FLUORIDES, *LIGHT, *POLYMERS, OPTICS, SCATTERING

Distribution Statement : APPROVED FOR PUBLIC RELEASE