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

Hsiao, Benjamin S. and Verma, Ravi K. (1998) A Novel Approach to Extract Morphological Variables in Crystalline Polymers from Time-Resolved Synchrotron SAXS Data. Journal of Synchrotron Radiation, 5 (1). pp. 23-29. ISSN 0909-0495. https://resolver.caltech.edu/CaltechAUTHORS:20170127-163001137

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1107/S0909049597010091DOIArticle
http://scripts.iucr.org/cgi-bin/paper?S0909049597010091PublisherArticle
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).
Funders:
Funding AgencyGrant Number
DuPont Central Research and DevelopmentUNSPECIFIED
NSFDMA-9629825
Subject Keywords:time-resolved SAXS; correlation function; interface distribution function; PET; interference function; Porod's law; lamellar morphology; crystalline polymers
Issue or Number:1
Record Number:CaltechAUTHORS:20170127-163001137
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170127-163001137
Official Citation:A Novel Approach to Extract Morphological Variables in Crystalline Polymers from Time-Resolved Synchrotron SAXS Data B. S. Hsiao and R. K. Verma J. Synchrotron Rad. (1998). 5, 23-29 https://doi.org/10.1107/S0909049597010091
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73801
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:30 Jan 2017 16:13
Last Modified:03 Oct 2019 16:31

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