Small-angle x-ray scattering studies of crazed glassy polymers
A small-angle x-ray scattering (SAXS) study of the relaxed craze structure in polystyrene was performed using the Oak Ridge National Laboratory 10-m SAXS facility. Coupled with known results from transmission electron microscopy studies, the SAXS patterns can be interpreted as scattering from an open-cell foam with void spaces interspersed among the fibrils. Results have shown the scattering centers in crazed polystyrene can be modeled as cylinders the axes of symmetry of which are parallel to the tensile axes. Scattering centers are bimodal in their size distribution, with aspect ratios of 1.0 and 2.6. Crazes in lower-molecular-weight polystyrene, while variations in strain rate and test temperature during craze formation have no effect on the relaxed craze morphology. A comparison of SAXS patterns from polystyrene and polycarbonate indicates that the morphologies of their respective crazes are significantly different.
- Research Organization:
- Univ. of Tennessee, Knoxville
- OSTI ID:
- 6973164
- Journal Information:
- J. Polym. Sci., Polym. Phys. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Phys. Ed.; (United States) Vol. 21; ISSN JPLPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360402* -- Polymers & Plastics-- Structure & Phase Studies-- (-1987)
CRACKS
CRYSTAL STRUCTURE
DEFORMATION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MORPHOLOGY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RADIATIONS
SCATTERING
SMALL ANGLE SCATTERING
SYNTHETIC MATERIALS
TENSILE PROPERTIES
VOIDS
X RADIATION