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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/7931

Title: Effect of Silica on Sherulite Structure and Photo-oxidative Degradation Behavior in Polypropylene/Silica Nanocomposites
Authors: Asuka, Kazuo
Sumino, Ken-ichi
Taniike, Toshiaki
Nitta, Koh-hei
Terano, Minoru
Keywords: Polypropylene/silica nanocomposite
Photo-degradation
Spherulite
Issue Date: 2007-07
Publisher: マテリアルライフ学会
Magazine name: Journal of Materials Life Society
Volume: 19
Number: 3
Start page: 128
End page: 131
Abstract: The physico-chemical interaction between hydrophobic polyolefin materials and originally hydrophilic inorganic nano-particles like surface hydroxylated SiO_2 has not been well understood up to now. In this study, the influences of particle size, content of hydrophilic SiO_2 nanoparticles on the isothermal growth rate of polypropylene (PP) spherulites in various PP/SiO_2 nanocomposites were investigated by polarized optical microscope equipped with temperature controlled hot stage. Moreover, photo-oxidative degradation behavior of the PP/ SiO_2 nanocomposites were investigated. It is most interesting to note that the addition of smaller SiO_2 nanoparticles effectively lowered the growth rate of PP spherulites in the composites and the spherulite growth rate became zero for the PP/16nm-SiO_2 nanocomposites with the SiO_2 content above 2.5 wt%. It was found that the sample without spherulite morphology is more stable to photo-degradation. Spherulite structure is considered to have the influence affect photo-oxidative degradation.
Rights: Copyright (C) 2007 マテリアルライフ学会. Kazuo Asuka, Ken-ichi Sumino, Toshiaki Taniike, Koh-hei Nitta, Minoru Terano, Journal of Materials Life Society, 19(3), 2007, 128-131.
URI: http://hdl.handle.net/10119/7931
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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