Characterization of polypropylene/layered silicate nanocomposites prepared by single-step method |
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| Authors: | Luljeta Raka Gordana Bogoeva-Gaceva Joachim Loos |
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| Institution: | (1) Faculty of Natural Sciences and Mathematics, State University of Tetovo, Bul. Ilinden, 1200 Tetovo, R. Macedonia;(2) Faculty of Technology and Metallurgy, University “Ss. Cyril and Methodius”, Rudjer Boskovic 16, 1000 Skopje, R. Macedonia;(3) Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands;(4) Dutch Polymer Institute, P. O. Box 902, 5600 AX Eindhoven, The Netherlands;(5) Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; |
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| Abstract: | 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. |
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