Characterization of polypropylene/layered silicate nanocomposites prepared by single-step method

L. Raka, G. Bogoeva-Gaceva, J. Loos

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)


The extent of organo-modified clay (C93A) platelets dispersion in polymer matrix and crystallization and melting behavior of iPP-based nanocomposites prepared by a single-step melt-mixing method were investigated by wide-angle X-ray diffraction (WAXD), transmission (TEM), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). WAXD patterns revealed exfoliated structure of nanocomposites containing 1 wt% clay, and mixed intercalated/exfoliated structure at higher concentration of nanoclay. The isothermal crystallization proceeds faster in the matrix polymer (iPP/PP-g-MA) than in nanocomposite samples. The results obtained for T m o suggest that the presence of nanoclay has induced a perfection of the formed crystals. The presence of C93A particles in PP leads to increase in crystallization peak temperature implying nucleating ability of clay particles, which was more pronounced in exfoliated than in mixed intercalated/exfoliated system.
Original languageEnglish
Pages (from-to)629-639
JournalJournal of Thermal Analysis and Calorimetry
Issue number2
Publication statusPublished - 2010

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