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Proceedings Paper

Investigation of the oxygen depletion properties of low density polyethylene resins filled with thermally stable oxygen scavengers
Author(s): Jen-taut Yeh; Li Cui; Yan-bin Sun; Li-ping Xu; Wei Wei; Fang-chang Tsai; Tao Jiang; Ping Zhu; Chi-Yuan Huang; Kan-Nan Chen
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Paper Abstract

The thermal stability, oxygen depletion and tensile properties of low density polyethylene (LDPE) resins filled with ascorbic acid (Vc), sodium ascorbate (SA), iron (Fe) and modified iron (MFe) oxygen scavengers were systematically investigated. Thermogravimetric analysis (TGA) results clearly suggest that the thermal stability of SA powder and L95(SA)5 specimen is significantly better than that of Vc powder and L95(Vc)5 specimen, respectively. The oxygen depletion efficiency of L95(SA)5 is significantly better than that of L95(Vc)5, L95(Fe)5 and L95(MFe)5 specimens, although the virgin SA powders exhibit worse oxygen depletion efficiency than Vc, Fe or MFe powders before melt blending. Moreover, at a fixed weight ratio of Vc (or SA) to MFe of the oxygen scavenger compounds, the oxygen depletion efficiency of L95[SAx(MFe)y]5 series specimens is always significantly better than that of L95[Vcx(MFe)y]5 series specimens. In fact, at weight ratios of Vc/MFe and SA/MFe higher than 3/7 and 5/5, respectively, the residual oxygen concentration values present in the airtight flask of L95[Vcx(MFe)y]5 and L95[SAx(MFe)y]5 series samples at any time are even lower than those of the L95(Vc)5 and L95(SA)5 specimens, respectively. Further tensile experiments show that the tensile properties of the L95[SAx(MFe)y]5 series samples are always higher than those of the corresponding L95[Vcx(MFe)y]5 series samples with the same loadings of oxygen scavenger compounds, respectively. In order to understand these interesting thermal stability, oxygen depletion and tensile properties of these LDPE oxygen-scavenging plastics, scanning electron microscope and energy dispersive X-rays analysis of the compositions on the surfaces of L95[SAx(MFe)y]5 and L95[Vcx(MFe)y]5 series samples were performed. Possible reasons accounting for these interesting properties of these LDPE oxygen-scavenging plastics are proposed.

Paper Details

Date Published: 20 October 2009
PDF: 15 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749368 (20 October 2009); doi: 10.1117/12.840791
Show Author Affiliations
Jen-taut Yeh, Hubei Univ. (China)
Wuhan Univ. of Science and Engineering (China)
National Taiwan Univ. of Science and Technology (Taiwan)
Li Cui, Wuhan Univ. of Science and Engineering (China)
Yan-bin Sun, Hubei Univ. (China)
Li-ping Xu, Hubei Univ. (China)
Wei Wei, Hubei Univ. (China)
Fang-chang Tsai, Hubei Univ. (China)
Tao Jiang, Hubei Univ. (China)
Ping Zhu, Wuhan Univ. of Science and Engineering (China)
Chi-Yuan Huang, Tatung Univ. (Taiwan)
Kan-Nan Chen, Tamkang Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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