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Coincorporation of nano‐silica and nano‐calcium carbonate in polypropylene
Author(s) -
Zhang Shilian,
Zhu Aiping,
Dai Sheng
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33925
Subject(s) - nanocomposite , materials science , polypropylene , differential scanning calorimetry , spherulite (polymer physics) , nanoparticle , crystallization , nano , supercooling , chemical engineering , calcium carbonate , composite material , dispersion (optics) , polymer chemistry , polymer , nanotechnology , physics , optics , engineering , thermodynamics
In this study, various polypropylene (PP) nanocomposites were prepared by melt blending method. The effects of different spherical nanofillers, such as 50 nm CaCO 3 and 20 nm SiO 2 , on the linear viscoelastic property, crystallization behavior, morphology and mechanical property of the resulting PP nanocomposites were examined. Rheological study indicated that coincorporation of nano‐SiO 2 and nano‐CaCO 3 favored the uniform dispersion of nanoparticles in the PP matrix. Differential scanning calorimeter (DSC) and polarizing optical microscopy (POM) studies revealed that the coincorporation of SiO 2 and CaCO 3 nanoparticles could effectively improve PP crystallizability, which gave rise to a lower supercooling temperature (Δ T ), a shorter crystallization half‐life ( t 1/2 ) and a smaller spherulite size in comparison with those nanocomposites incorporating only one type of CaCO 3 or SiO 2 nanoparticles. The mechanical analysis results also showed that addition of two types of nanoparticles into PP matrix gave rise to enhanced performance than the nanocomposites containing CaCO 3 or SiO 2 individually. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011