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Promotion of the gamma-phase of polyamide 6 in its nanocomposite with phosphate glass

TitlePromotion of the gamma-phase of polyamide 6 in its nanocomposite with phosphate glass
Publication TypeJournal Article
Year of Publication2008
AuthorsRawal A, Fang XW, Urman K, Iverson D, Otaigbe JU, Schmidt-Rohr K
Journal TitleJournal of Polymer Science Part B-Polymer Physics
Volume46
Pages857-860
Date PublishedMay
Type of ArticleArticle
ISBN Number0887-6266
Accession NumberISI:000255509100002
KeywordsC-13, crystal structure, gamma-phase, HYBRIDS, MORPHOLOGY, nanocomposites, nmr, nylon, NYLON-6 CLAY NANOCOMPOSITES, polyamide-6, stability
Abstract

The effect of tin fluorophosphate-glass (Pglass) nanoparticles on the polyamide-6 (PA6) matrix in Pglass/PA6 hybrids has been investigated by C-13 solid-state nuclear magnetic resonance (NMR). The crystallinity determined by direct-polarization C-13 NMR combined with longitudinal relaxation-time (TIC) filtering varied between 31 and 44%. T-1C-filtered C-13 spectra with cross polarization clearly showed resonances of both the alpha- and gamma-crystalline phases of PA6, typically at ratios near 45:55, while the similarly processed neat polymer contained only the a-phase. This suggests that the Pglass promotes the growth of the gamma-crystalline phase. (c) 2008 Wiley Periodicals, Inc.
DOI10.1002/polb.21418
Alternate JournalJ. Polym. Sci. Pt. B-Polym. Phys.