A Novel Approach to Extract Morphological Variables in Crystalline Polymers from Time-Resolved Synchrotron SAXS Data

Creators: Hsiao, Benjamin S.; Verma, Ravi K.

Abstract

A novel approach to extract morphological variables in crystalline polymers from time-resolved SAXS data using the method of correlation and interface distribution functions has been devised. The principle of the calculation is based on two alternative expressions of Porod's law using the form of the interference function. The approach enables the continuous estimate of the Porod constant, and corrections for liquid scattering and finite interface between the two phases, from the time-resolved data. A model of lamellar morphology has been implemented to interpret the calculated correlation and interface distribution functions. Many detailed morphological variables such as lamellar long period, thicknesses of crystal and amorphous phases, interface thickness, and scattering invariant can be estimated. An example analysis of isothermal crystallization in PET measured by synchrotron SAXS is demonstrated.

Additional Information

© 1998 International Union of Crystallography. (Received 15 February 1997; accepted 9 July 1997) We gratefully acknowledge helpful discussions with Drs A. Biswas, N. Stribeck and the Late Professor H. G. Zachmann for the analysis of correlation and interface distribution functions using the lamellar model. The example SAXS profiles of PET were obtained with the assistance of Drs S. Seifert and P. Harnev. This work was supported by DuPont Central Research and Development and a grant from the NSF-GOALI program (DMA-9629825).

Attached Files

Published - hi0051.pdf

Files

hi0051.pdf

Files (680.3 kB)

Name	Size	Download all
hi0051.pdf md5:c66ab0385f678166f72d1d283ad09b5d	680.3 kB	Preview Download

Additional details

	All versions	This version
Views	0	0
Downloads	0	0
Data volume	0 Bytes	0 Bytes