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Mechanical properties and morphologies of polypropylene composites synergistically filled by styrene‐butadiene rubber and silica nanoparticles
Author(s) -
Wang WeiZhi,
Liu Tianxi
Publication year - 2008
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.28021
Subject(s) - materials science , thermogravimetric analysis , polypropylene , differential scanning calorimetry , composite material , nanocomposite , scanning electron microscope , thermal stability , nanoparticle , izod impact strength test , natural rubber , chemical engineering , ultimate tensile strength , nanotechnology , physics , engineering , thermodynamics
The mechanical properties and morphologies of PP/SBR/SiO 2 nanocomposites have been studied using mechanical testing, wide‐angle X‐ray diffraction (WAXD), polarizing optical microscopy (POM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of neat polypropylene can be considerably improved by synergistically filling with SiO 2 and SBR nanoparticles, especially for the notched Izod impact strength. The results from the WAXD, POM, SEM, DSC, and TGA measurements reveal that: (i) the β‐phase crystal structure of PP is formed when SiO 2 and SBR nanoparticles are synergistically filled with polypropylene and its formation plays a role for the enhancement of the impact strength for PP/SBR/SiO 2 nanocomposites; (ii) the dispersion of SiO 2 and SBR nanoparticles in PP/SBR/SiO 2 composites is homogeneous, indicating that synergistic incorporating method decreases the aggregation of nanoparticles and thus increases the sites for dissipation of shock for impact energy in PP/SBR/SiO 2 nanocomposites; (iii) the thermal analysis shows high thermal stability for the PP/SBR/SiO 2 nanocomposites. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008