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Preparation and characterization of injection‐homo‐polypropylene filled with nano‐CaCO 3
Author(s) -
Wang WenYi,
Wang GuoQuan,
Zeng XiaoFei,
Chen JianFeng
Publication year - 2009
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.30385
Subject(s) - materials science , composite material , nano , scanning electron microscope , crazing , nanometre , polypropylene , nanoscopic scale , dynamic mechanical analysis , transmission electron microscopy , thermal stability , polarized light microscopy , characterization (materials science) , chemical engineering , polymer , nanotechnology , optics , physics , engineering
Nano‐CaCO 3 /homo‐PP composites were prepared by melt‐blending using twin‐screw extruder. The results show that not only the impact property but also the bending modulus of the system have been evidently increased by adding nano‐CaCO 3 . The nano‐CaCO 3 particles have been dispersed in the matrix in the nanometer scale which was investigated by means of transmission electron microscopy (TEM). The toughening mechanism of nano‐CaCO 3 , investigated by means of dynamical mechanical thermal analysis (DMTA) and scanning electron microscopy (SEM), lies on that the nano‐CaCO 3 particles take an action of initiating and terminating crazing (silver streak), which can absorb more impact energy than the neat PP. At the same time, the nano‐CaCO 3 particles, as the nuclear, decrease the crystal size of PP, the results of which were investigated by means of polarized optical microscope (POM). © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010