Preparation and characterization of polypropylene/silica nanocomposites by gamma irradiation via ultrafine blend |
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Authors: | Jun?Qian Guangchun?Cheng Huagui?Zhang Email author" target="_blank">Yongshen?XuEmail author |
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Affiliation: | (1) School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People’s Republic of China |
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Abstract: | Polypropylene/silica nanocomposites were prepared by gamma irradiation via ultrafine blend so that the silica at 3% loading
level can be well dispersed to polymeric materials for improving their mechanical performance. First, ultrafine blend processing
in the melt state is an effective method for improving physical dispersion of nanosilica. Then irradiation technique generates
firm and impervious joint between polypropylene and silica, due to the adding of the compatibilizer, maleic anhydride grafted
polypropylene. The reaction of maleic anhydride groups with the hydroxyl groups on the surface of nanosilica was characterized
by Fourier Transform Infrared Spectra (FTIR). Scanning electronic microscopy (SEM), X-ray diffraction analysis (XRD), differential
scanning calorimeter (DSC) and polarized optical microscope (POM) were introduced to characterize the polypropylene/silica
nanocomposites. Also the mechanical properties of the nanocomposites were evaluated by tensile strength, young’s modulus and
elongation at break, which showed good enhancement due to well dispersed silica and improving interface combination. |
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Keywords: | |
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