Alignment of liquid crystal molecules on oriented (E-CE)C/PAA films |
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| Authors: | Benqiao He Yong Huang |
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| Institution: |
a State Key Laboratory of Polymer Physics and Chemistry, Joint Laboratory of Polymer Science and Material, Institute of Chemistry, CAS, Beijing 100080, PR China
b Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, CAS, Guangzhou 510650, PR China |
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| Abstract: | A film of ethyl-cyanoethyl cellulose/polyacrylic acid, (E-CE)C/PAA, using an alignment layer of liquid crystal (5CB), was prepared by shearing and then photo-polymerization of an (E-CE)C/AA solution. The orientation of the (E-CE)C chains in the sheared film and the alignment of the 5CB molecules on the films were investigated by polarizing optical microscopy and FTIR. It was found that the (E-CE)C/PAA oriented film showed perfect alignment ability for the 5CB molecules. The director of the 5CB molecules on the oriented film does not lie along the orientation direction of the (E-CE)C main chains, but inclines to that of the (E-CE)C main chains. The direction of the 5CB molecular orientation on the (E-CE)C/PAA oriented film is influenced by the degree of orientation of the (E-CE)C chains in the oriented film. |
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