Open AccessSmall‐angle X‐ray scattering on the ChemMatCARS beamline at the Advanced Photon Source: a study of shear‐induced crystallization in polypropylene
Author(s) -
Sutton David,
Hanley Tracey,
Knott Robert,
Cookson David
Publication year - 2004
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049504022873
Subject(s) - small angle x ray scattering , beamline , materials science , polypropylene , scattering , crystallization , advanced photon source , small angle scattering , optics , shear (geology) , x ray , synchrotron , perpendicular , crystallography , beam (structure) , composite material , physics , chemistry , geometry , mathematics , thermodynamics
The first ever time‐resolved small‐angle X‐ray scattering (SAXS) data from the undulator 15‐ID‐D beamline (ChemMatCARS) are presented. A 1.3 Å (9.54 keV) X‐ray beam was selected to study the structure development in a polypropylene sample during shear‐induced crystallization. A Linkam CSS450 shear cell provided the temperature and shear control. The polypropylene was first melted and then quenched to the crystallization temperature, where a step shear was applied. The SAXS data were collected using a Bruker 6000 CCD detector, which provided images of excellent resolution. The SAXS images (with 180° rotational symmetry) indicated that the polypropylene crystallizes with a high degree of anisotropy, and the lamellae are oriented perpendicular to the flow direction.