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- Title
SAXS study applied to reversibly crosslinked isotactic polypropyleneclay nanocomposites.
- Authors
S. Bouhelal; M. E. Cagiao; D. Benachour; B. Djellouli; L. Rong; B. S. Hsiao; F. J. BaltáCalleja
- Abstract
A new route based on reversibly crosslinking reactive extrusion is applied for the development of iPPclay nanocomposites. Analysis of smallangle Xray scattering SAXS reflections of isotactic polypropylene iPPclay nanocomposites, prepared by two different mixing and chemical crosslinking methods i.e., conventional and in situ, is presented and results are compared with preceding wideangle Xray diffraction WAXD results. It is shown that the presence of clay significantly affects the value of long spacing in iPP, as well as the coherence length of lamellar stacks. Results show that the size of the coherently diffracting nanodomains decreases in two stages, first rapidly and then slowly as a function of increasing clay content. This can be attributed to the influence of confined iPP lamellae under the effect of rising number of clay particles. The appearance of the γcrystalline form in the crosslinked iPPclay nanocomposites is related with the difficulty in chain folding of iPP chains introduced by the chemical crosslinking process, as well as by the presence of clay particles. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
- Subjects
NANOCOMPOSITE materials; CROSSLINKING (Polymerization); CROSSLINKED polymers; CHEMICAL reactions; EXTRUSION process
- Publication
Journal of Applied Polymer Science, 2010, Vol 117, Issue 6, p3262
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.32241