Novel Poly(esterimide)s Containing a Push-Pull Type Azobenzene Moiety-Synthesis, Characterization and Optical Properties
| Autor: | Krzysztof Switkowski, B. Pura, Ewa Schab-Balcerzak, Bozena Jarzabek, Mariola Siwy |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Polymer Journal. 40:813-824 |
| ISSN: | 1349-0540 0032-3896 |
| DOI: | 10.1295/polymj.pj2008076 |
| Popis: | In this paper, novel poly(esterimide)s with attached as a side group azobenzene chromophores are presented. The polymers differing in substituents on the azobenzene moieties and chromophore concentration. Azopolymers were obtained by a two-step synthetic approach. This include the preparation of a precursor poly(esterimide) with benzene moiety pendant from main chains, followed by the covalent bonding of the NLO chromophores onto the polyimide backbone by a post-azo-coupling reaction using the following coupling components: p-nitroaniline, 2-cyan-4-nitroanilin, 2,4-dinitroaniline and Disperse Orange 3. The precursor poly(esterimide) was obtained from synthesized 2,2′[N-phenylethyloaniline-di(4-estro-1,2-dicarboxylic)]anhydride and 4,4′-methylene bis(2,6-dimethylaniline). The degree of functionalization of the poly(esterimide)s was estimated by UV-vis spectroscopy. The obtained polymers were characterized and evaluated by FT-IR, 1H NMR, X-ray, UV-vis, DSC and TGA. The results showed the azopolymers exhibited high glass transition temperatures (Tg=159–224 °C), high thermal stability with decomposition temperatures in the range of 311–334 °C and good solubilities in common organic solvents. First time two-photon absorption (TPA) coefficient in cast films of amorphous azopoly(esterimide)s was measured using Z-scan experiment which was performed with femtosecond laser pulses 100 fs at 800 nm. The TPA coefficient was determined to be in the range of 1.54–11.69cm/GW. |
| Databáze: | OpenAIRE |
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