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Polymer Bulletin
Erschienen in: Polymer Bulletin 4/2015

01.04.2015 | Original Paper

Photo- and pH-sensitive azo-containing cationic waterborne polyurethane

verfasst von: Junpei Li, Xingyuan Zhang, James Gooch, Wei Sun, Huaiwei Wang, Kunpeng Wang

Erschienen in: Polymer Bulletin | Ausgabe 4/2015

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Abstract

In this study, a novel photo- and pH-sensitive cationic waterborne polyurethane containing side chain aromatic azo groups (Azo-CWPU) was synthesized by step-growth addition polymerization from polyether polylol, isophorone diisocyanate, N-methyl diethanolamine and a new aromatic azo-containing monomer, 2,2′-(4-((4-ethylphenyl)diazenyl)phenylazanediyl)diethanol (EDPD). Azo-CWPU showed a significant hypsochromic contrast to the azo monomer and rapid changes in UV–Vis absorption spectra at different irradiation times. Azo-CWPU dispersion displays bright yellow, orange and red color with the change of pH values. Regarding the orange dispersion, we assume that there is a mixture of the azoic form and the hydrazone form. Compared to cationic waterborne polyurethane dispersion without aromatic azo groups (CWPU), Azo-CWPU dispersion with smaller hydrodynamics radius and more narrow distribution shows good thermodynamic properties of polyurethane.
Vorheriger Artikel Electrochemistry of poly(5-phenyl dipyrromethane) and its characterization
Nächster Artikel Effect of triphenylamine as electron-donor evenly spaced in 2, 4, 6 and 8 thiophene units of the main chain: synthesis and properties

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Metadaten
Titel
Photo- and pH-sensitive azo-containing cationic waterborne polyurethane
verfasst von
Junpei Li
Xingyuan Zhang
James Gooch
Wei Sun
Huaiwei Wang
Kunpeng Wang
Publikationsdatum
01.04.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 4/2015
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-015-1312-9

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