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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Acknowledgements
The financial support from COST Action P12 “Structuring of Polymers,” COST-STSM-P12-02842 is greatly appreciated. Thanks are due to the Ministry of Education and Science of Republic of Macedonia for the financial support of the COST-related project activities. We thank Dr. Kangbo Lu from the Department of Chemical Engineering and Chemistry, Eindhoven University of Technology for TEM measurements.
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Raka, L., Bogoeva-Gaceva, G. & Loos, J. Characterization of polypropylene/layered silicate nanocomposites prepared by single-step method. J Therm Anal Calorim 100, 629–639 (2010). https://doi.org/10.1007/s10973-009-0545-y
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DOI: https://doi.org/10.1007/s10973-009-0545-y