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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/8821

Title: Degradation behavior of polymer blend of isotactic polypropylenes with and without unsaturated chain end group
Authors: Nakatani, Hisayuki
Kurniawan, Dodik
Taniike, Toshiaki
Terano, Minoru
Keywords: polypropylene
unsaturated chain end groups
activation energy
radical initiator
Issue Date: 2008-07-07
Publisher: Institute of Physics and IOP Publishing Limited
Magazine name: Science and Technology of Advanced Materials
Volume: 9
Start page: 024401-1
End page: 024401-5
DOI: 10.1088/1468-6996/9/2/024401
Abstract: In this work, the relationship between the unsaturated chain end group content and the thermal oxidative degradation rate was systematically studied with binary polymer blends of isotactic polypropylene (iPP) with and without the unsaturated chain end group. The iPPs with and without the unsaturated chain end group were synthesized by a metallocene catalyst in the absence of hydrogen and by a Ziegler catalyst in the presence of one, respectively. The thermal oxidative degradation rate of the binary iPP blends was estimated from the molecular weight and the apparent activation energy (ΔE), which were obtained through size exclusion chromatography (SEC) and thermogravimetric analysis (TGA) measurements, respectively. These values exhibited a negative correlation against the mole content of the unsaturated chain end group. The thermal oxidative degradation rate apparently depends on the content of the unsaturated chain end group. This tendency suggests that the unsaturated chain end acts as a radical initiator of the iPP degradation reaction.
Rights: Copyright (C) Institute of Physics and IOP Publishing Limited 2008. This is the author-created version of Institute of Physics and IOP Publishing Limited, Hisayuki Nakatani, Dodik Kurniawan, Toshiaki Taniike and Minoru Terano, Science and Technology of Advanced Materials, 9, 2008, 024401-1-024401-5. http://dx.doi.org/10.1088/1468-6996/9/2/024401
URI: http://hdl.handle.net/10119/8821
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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