A new photoimaging system based on a trisdiazonium salt as a photocrosslinker for sulfonated polyelectrolytes

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Abstract

A photocrosslinker based on a trisdiazonium salt has been synthesized from 4,4′,4″-triaminotriphenylamine. Polyelectrolyte complexes can be obtained by mixing the trisdiazonium crosslinker with poly(styrenesulfonate) (PSS). The polyelectrolyte complex precipitates when PSS is added in an ionic ratio of around 1:1 to a trisdiazonium salt solution. However, the addition of an excess of PSS to the mixture leads to redissolution of the precipitate. A mixture of PSS and the photocrosslinker (27 wt.%) can be processed from solution to give thin films by spin coating. When the films are irradiated with UV light, a change in the solubility of the material is observed, which is due to the decomposition of diazonium groups and the transformation of the ionic bond into a covalent one, which in turn transforms the polyelectrolyte complex into a covalent network. The process has been characterized by UV and IR spectroscopy. Photoimaging experiments have been performed on this material and polymeric relief structures have been obtained through a photolithographic process. © 2009 Elsevier Ltd. All rights reserved.

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APA

Lomba, M., Oriol, L., & Sánchez, C. (2009). A new photoimaging system based on a trisdiazonium salt as a photocrosslinker for sulfonated polyelectrolytes. European Polymer Journal, 45(6), 1785–1790. https://doi.org/10.1016/j.eurpolymj.2009.02.018

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