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International Journal of Polymeric Materials and Polymeric Biomaterials Volume 60, 2010 - Issue 1
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Original Articles

Synthesis and Characterization of Photochromic Copolymer Grafting Azoaromatic Chromospheres on Pullulan

Xinghai Yu Department of Chemistry, Hexi University, Zhang Ye, ChinaCorrespondence[email protected]
,
Zhengsheng Fu College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, China
,
Honggang An Department of Chemistry, Hexi University, Zhang Ye, China
,
Dongqing Wu Department of Chemistry, Hexi University, Zhang Ye, China
,
Yuqi Han Department of Chemistry, Hexi University, Zhang Ye, China
&
Hai Song Department of Chemistry, Hexi University, Zhang Ye, China
Pages 40-50 | Received 23 Feb 2010, Accepted 28 Apr 2010, Published online: 09 Nov 2010
 
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Abstract

Preparation of photochromic copolymer grafting 4-(4-nitro phenylazo)-1-naphthol units on a pullulan molecular surface has been accomplished. Surface modification was carried out in aqueous solution by an inverse emulsion polymerization method. Polymerization products were characterized by IR, SEM, XRD and TG-DTA. UV-vis spectroscopy has been used to monitor the photoisomerization of azobenzene moieties on a pullulan molecular surface. The results indicated that functional copolymer has a better photochromism property than its corresponding azobenzene moieties, reflecting the macromolecular backbone of pullulan should actively affect the photoisomerization of azoaromatic moieties.

We gratefully acknowledge the Hexi University and Northwest Normal University for their financial support.

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