1999•Macromolecular Rapid CommunicationsRequires access

Synthesis of hyperbranched aliphatic polyethers via cationic ring-opening polymerization of 3-ethyl-3-(hydroxymethyl)oxetane

Heléne Magnusson, Eva Malmström, Anders Hult

Abstract

Thermally initiated cationic ring-opening polymerization of 3-ethyl-3-(hydroxymethyl)oxetane was carried out using benzyltetramethylenesulfonium hexafluoroantimonate as initiator. The resulting hydroxy-functional polyether was thoroughly analyzed by 1H and 13C NMR spectroscopy and found to have a hyperbranched architecture with a degree of branching of 0.4. The polyether was successfully employed as a multifunctional initiator for ε-caprolactone. Molecular weight measurements on the polyether showed a narrow molecular weight distribution analyzed by SEC and MALDI-TOF (1.3 and 1.4, respectively).

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Available abstract

Key concepts: Oxetane, Cationic polymerization, Hydroxymethyl, Branching (polymer chemistry), Polymer chemistry, Ring-opening polymerization, Polymerization, Molar mass distribution