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Proceedings Paper

Measurement of degree of orientation of high polymer using rotating linear polarization imaging
Author(s): Dongzhi Li; Ran Liao; Nan Zeng; Yonghong He; Hui Ma
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Paper Abstract

Degree of orientation is an important parameter for the oriented high polymer, determining shock strength and elongation at break. An optical method sensitive to the well-oriented sample, was originated at our lab, and named as rotating linear polarization imaging. This method expresses the polarization difference as a function of multi-incident and multi-detection polarization angles. A parameter, α, is fitted and the resulting α image shows the 2-dimensional spatial distribution of the orientation of sample. Experiments are designed to acquire the α images when stretching is performed under different directions according to changes of the degree of orientation; and these α images are compared with the normal case in which no stretching is performed. The acquired α images show that when stretching along the orientation of sample (enlarge degree of orientation), the values of α become larger than the normal case, and at the perpendicularity direction (reduce degree of orientation), the values are smaller. Experiments show that á could characterize the degree of orientation well and indicate the potential of our method to measure the degree of orientation of high polymer.

Paper Details

Date Published: 28 October 2009
PDF: 7 pages
Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 75190U (28 October 2009); doi: 10.1117/12.843503
Show Author Affiliations
Dongzhi Li, Tsinghua Univ. (China)
Ran Liao, Tsinghua Univ. (China)
Nan Zeng, Tsinghua Univ. (China)
Yonghong He, Tsinghua Univ. (China)
Hui Ma, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 7519:
Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009)
Qingming Luo; Lihong V. Wang; Valery V. Tuchin; Pengcheng Li; Ling Fu, Editor(s)

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