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In-situ molecular orientation behavior of isotactic polypropylene films prepared by quenching at 0 ºC was investigated under uniaxial and biaxial extension at elevated temperatures. Both the retardation value of film and the stress were simultaneously measured during stretching. The stress required to deform films depended on the stretching temperature, but the retardation was nearly independent of temperature.
From S. Yoshida 1 2 | T. Sawada 2 | T. Kawamura 2 | K. Nitta 2
1Kobe Fundamental Research Laboratory, Sumitomo Bakelite Co., Ltd. Kobe, Japan
2Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan
2Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan
(Received 31.05.2011; accepted 08.10.2011)
Appeared in International Polymer Processing 2012/02, Page 237-244
DOI: 10.3139/217.2527
Direct link: http://www.polymer-process.com/IPP2527
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Molecular Orientation Behavior of Isotactic Polypropylene Films under Uniaxial and Biaxial Deformation at Elevated Temperatures [818 KB]
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References
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