title: Transition-metal-free synthesis of supramolecular ionic alginate-based polyurethanes.
abstract: Novel high molecular weight alginate-based supramolecular ionic polyurethane (SPU) networks were prepared via the reaction of chemically modified polyanionic alginate and isocyanate-terminated cationic oligourethanes under transition-metal-free conditions. Alginate, a naturally occurring polyanionic carbohydrate diol possessing carboxylate groups, was considered as both chain extender and the anionic part of SPU network. The tailor-made, ionically crosslinked linear alginate-based SPUs illustrated superior thermal stability with a decomposition temperature around 500°C at 10% weight loss which specializes them as highly thermally stable, wonder materials compared to the today's high-tech products.
authors.affiliation: Department of Polyurethane and Nanopolymers, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Islamic Republic of Iran; Advanced Materials Lab., Department of Cell Engineering, Royan Institute, Tehran, Iran; Department of Cell Engineering, Stem Cells and Developmental Biology, Cell Science Research Center, ACECR, Royan Institute, Tehran, Iran. Electronic address: h.daemi@ippi.ac.ir.
authors.forename: Hamed
authors.initials: H
authors.lastname: Daemi
authors.affiliation: Department of Polyurethane and Nanopolymers, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Islamic Republic of Iran. Electronic address: M.Barikani@ippi.ac.ir.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Barikani
authors.affiliation: POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa 72, 20018 Donostia-San Sebastián, Spain.
authors.forename: Haritz
authors.initials: H
authors.lastname: Sardon
keywords: Alginate; Ionic network; Metal-free; Supramolecular polyurethane; Thermal properties