Owen, Anthony and Bergmann, Antje (2004) On the fractal character of polymer spherulites: an ultra-small-angle X-ray scattering study of poly[(R)-3-hydroxybutyrate]. POLYMER INTERNATIONAL, 53 (1). pp. 12-14. ISSN 0959-8103, 1097-0126
Full text not available from this repository. (Request a copy)Abstract
Ultra-small-angle X-ray scattering (USAXS) and small-angle X-ray scattering (SAXS) measurements are presented for poly[(R)-3-hydroxybutyrate] (PHB) crystallized at room temperature. The USAXS patterns indicated that the spherulites had a radially orientated fibrillar nanostructure with fractal geometry over a length scale ranging from 12 nm up to at least 300 nm, with a mass fractal dimension of approximately 2.7 in aged samples. The SAXS patterns indicated that the fibrils themselves were built up of bundles of crystalline lamellae separated by layers of disordered material, with a period length of approximately 6 nm. The SAXS measurements during primary crystallization gave an initial fractal dimension of 4 during spherulite growth, due to the sharp phase boundary between the spherulites and the melt. (C) 2004 Society of Chemical Industry.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ultra-small-angle X-ray scattering; poly [(R)-3-hydroxybutyrate]; fractals; crystallization; spherulites |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 08:32 |
| Last Modified: | 27 Jul 2021 08:32 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38253 |
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