Preparation and Characterization of PVC-based Photoresponsive Polymers Containing Azo-chromophores |
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| Authors: | Bin Mu Chunyin Lu Yun Dong Peng Liu |
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| Institution: | Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou, Gansu, China |
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| Abstract: | New strategy was developed for the preparation of the photoresponsive polymers containing azo-chromophores as side-groups from the active chlorine atoms of polyvinyl chloride (PVC). The anilinated polyvinyl chloride precursors, anilinated polyvinyl chloride (PVC-An) and o-chloroanilinated polyvinyl chloride (PVC-oClAn), synthesized chemically by reacting PVC with sodium aniline (o-chloroaniline) salt. Then the two novel PVC-based polymers functionalized with azo-chromophores (PVC-AZ-An and PVC-o-AZ-NP) were synthesized via the azo-coupling reactions of the anilinated polyvinyl chloride precursors (PVC-An and PVC-oClAn) with the diazonium salts of aniline and alpha naphthylamine, respectively. The structures of polymers were confirmed by FTIR and 1H–NMR. The UV-Vis spectra of the obtained polymer in THF solution showed that the π ?π ? absorption band of PVC-o-AZ-NP shifted to longer wavelength (red-shifted) due to the influence of auxochrome (-Cl) compared to the π ?π ? absorption band of PVC-AZ-An. |
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| Keywords: | Photoresponsive polymer azo-chromophore polyvinyl chloride azo-coupling reaction |
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