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Exclusion of noncrystalline polymer from the interlamellar region in poly(vinylidene fluoride)/poly(methyl methacrylate) blends

Saito, H. ; Stühn, B. :
Exclusion of noncrystalline polymer from the interlamellar region in poly(vinylidene fluoride)/poly(methyl methacrylate) blends.
In: Macromolecules, 27 (1) S. 216-218.
[Artikel] , (1994)

Kurzbeschreibung (Abstract)

We investigated the intraspherulitic structure of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blends using polarized microscopy and small-angle X-ray scattering (SAXS). The structure of the spherulite is coarser with increasing crystallization temperature. The internal crystallinity obtained by SAXS is much larger than its overall value derived from DSC for the coarse spherulite, indicating that the amorphous region between lamellar bundles is large in this structure. For coarser structures, the electron density difference between the crystalline and the amorphous phase, obtained from an analysis of SAXS scattering profiles, is lower. That is, the concentration of PMMA in the interlamellar amorphous region is low in the coarse spherulite. This suggests that PMMA is partially excluded from the interlamellar region in the coarse spherulite.

Typ des Eintrags: Artikel
Erschienen: 1994
Autor(en): Saito, H. ; Stühn, B.
Titel: Exclusion of noncrystalline polymer from the interlamellar region in poly(vinylidene fluoride)/poly(methyl methacrylate) blends
Sprache: Englisch
Kurzbeschreibung (Abstract):

We investigated the intraspherulitic structure of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blends using polarized microscopy and small-angle X-ray scattering (SAXS). The structure of the spherulite is coarser with increasing crystallization temperature. The internal crystallinity obtained by SAXS is much larger than its overall value derived from DSC for the coarse spherulite, indicating that the amorphous region between lamellar bundles is large in this structure. For coarser structures, the electron density difference between the crystalline and the amorphous phase, obtained from an analysis of SAXS scattering profiles, is lower. That is, the concentration of PMMA in the interlamellar amorphous region is low in the coarse spherulite. This suggests that PMMA is partially excluded from the interlamellar region in the coarse spherulite.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Macromolecules
Band: 27
(Heft-)Nummer: 1
Fachbereich(e)/-gebiet(e): 05 Fachbereich Physik > Institut für Festkörperphysik
05 Fachbereich Physik
Hinterlegungsdatum: 26 Feb 2010 13:55
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