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Synthesis of hydrogels by radiation‐induced cross‐linking of Pluronic® F127 in N~2~O‐saturated aqueous solution by Piotr Ulanski; Wioletta Pawlowska; Slawomir Kadlubowski; Artur Henke; Ronny Gottlieb; Karl-Friedrich Arndt; Lev Bromberg; T. Alan Hatton; Janusz M. Rosiak is a Materials Science article available to read on EtoBox.

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## Abstract Pluronic F127, a tri‐block copolymer of poly(ethylene oxide) and poly(propylene oxide) of a nominal formula EO~100~‐PO~65~‐EO~100~, when subjected to the action of ionizing radiation in oxygen‐free, N~2~O‐saturated aqueous solution, undergoes predominantly cross‐linking by intermolecular recombination of polymer‐derived radicals. This manifests itself as an increase in average molecular weight and, at sufficiently high doses, as a formation of permanent hydrogel. Cross‐linking occurs with high yields. Side reactions include chain scission and traces of oxidation processes. Polymer concentration and temperature influence the yields of radiation‐induced reactions. This indicates that radiolysis mechanism depends on the spatial arrangement of Pluronic molecules, which can be organized into single chains, micelles, and physical gel. Macroscopic hydrogels of Pluronic are thermo‐sensitive (phase transition temperature behavior with the transition temperature, at the tested conditions, of __ca.__ 27 °C). Pluronic gels are prone to oxidative degradation, both in an aqueous environment and in the dry state, especially at elevated temperatures. Copyright © 2006 John Wiley & Sons,

Who reads Synthesis of hydrogels by radiation‐induced cross‐linking of Pluronic® F127 in N~2~O‐saturated aqueous solution?

Author

Piotr Ulanski; Wioletta Pawlowska; Slawomir Kadlubowski; Artur Henke; Ronny Gottlieb; Karl-Friedrich Arndt; Lev Bromberg; T. Alan Hatton; Janusz M. Rosiak

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1042-7147)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)