Biaxial orientation in HDPE films : Comparison of infrared spectroscopy, X-ray pole figures and birefringence techniques

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DOIResolve DOI: http://doi.org/10.1016/j.polymer.2005.03.002
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TypeArticle
Journal titlePolymer
Volume46
Issue11
Pages38383846; # of pages: 9
SubjectHDPE crystalline and amorphous phases orientation; FTIR spectroscopy; X-ray diffraction pole figures
AbstractIn this study, high-density polyethylene films (HDPE) were produced using different processes (film blowing and biaxial orientation) and processing conditions. The orientation of the films was characterized in terms of their biaxial crystalline, amorphous and global orientation factors using birefringence, Fourier transform infrared spectroscopy (FTIR) using a tilted incidence technique and X-ray pole figures. Evaluation of a simplified FTIR procedure without using the tilted method for the determination of crystalline orientation factors proposed in the literature is also evaluated and assessed. The results indicate that FTIR overestimate the crystalline orientation factors, particularly for the crystalline a-axis. Significant discrepancies are also observed for the b-axis orientation, which may be due to an overlap of the amorphous contribution and/or saturation of FTIR bands. Those differences are larger for films with low orientation, such as blown films. Amorphous phase orientation from FTIR depends on the band used and is not necessarily in agreement with that determined from combination of X-ray and birefringence.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number54304
NPARC number18425026
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Record identifier69f71c10-2c0b-4867-ae6f-ad8181b0bbc3
Record created2011-08-23
Record modified2016-05-09
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