Study on the oriented recrystallization of carbon-coated polyethylene oriented ultrathin films

Chang, Haibo, Guo, Qipeng, Shen, Deyan, Li, Lin, Qiu, Zhaobin, Wang, Feng and Yan, Shouke 2010, Study on the oriented recrystallization of carbon-coated polyethylene oriented ultrathin films, Journal of physical chemistry B, vol. 114, no. 41, pp. 13104-13109.

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Title Study on the oriented recrystallization of carbon-coated polyethylene oriented ultrathin films
Author(s) Chang, Haibo
Guo, Qipeng
Shen, Deyan
Li, Lin
Qiu, Zhaobin
Wang, Feng
Yan, Shouke
Journal name Journal of physical chemistry B
Volume number 114
Issue number 41
Start page 13104
End page 13109
Total pages 6
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2010-10-21
ISSN 1520-6106
1520-5207
Summary It is confirmed that a layer of vacuum-evaporated carbon on the surface of a preoriented ultrathin polymer film can lead to an oriented recrystallization of the polymer film. This has been attributed to a strong fixing effect of vacuum-evaporated carbon layer on the film surface of the polymer. To study the origin of the strong fixing effect of vacuum-evaporated carbon layer on the polymer films, the melting and recrystallization behaviors of the preoriented ultrathin PE film with a vacuum-evaporated carbon layer were studied by using atomic force microscopy, electron diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. We found that there exists some extent of chain orientation of carbon-coated polyethylene (PE) preoriented ultrathin film above its melting temperature. These oriented PE chain sequences act as nucleation sites and induce the oriented recrystallization of preoriented PE film from melt. Raman spectroscopy results suggest that new carbon-carbon bonds between the carbon layer and the oriented PE film are created during the process of vacuum carbon evaporation. As a result, some of the PE chain stems are fixed to the coated carbon substrate via covalent bond. Such a bonding has retarded the relaxation of the PE chains at the spot and, therefore, preserves the original orientation of the PE stems at high temperature, which in turn derives the recrystallization of the PE chains in an oriented structure.
Notes Published on Web 09/24/2010
Language eng
Field of Research 100708 Nanomaterials
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30035330

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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