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Polymers 2016, 8(8), 278;

Multifunctional Benzoxazines Feature Low Polymerization Temperature and Diverse Polymer Structures

Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, Bremen 28359, Germany
NMR-supported Structural Biology, Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, Berlin 13125, Germany
Author to whom correspondence should be addressed.
Academic Editor: Changle Chen
Received: 27 June 2016 / Revised: 19 July 2016 / Accepted: 27 July 2016 / Published: 2 August 2016
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3,4-dihydro-3-phenyl-2H-1,3-benzoxazines derived from phenol-, resorcinol-, and phloroglucinol give monomers with one, two, and three oxazine units at a single benzene ring, respectively. Aside from the synthesis and characterization of such multifunctional benzoxazines, reactivity and polymerization behavior is studied in dependence of the oxazine functionality. Monomer reactivities are directly related to the number of oxazine functionalities present at the benzene ring yielding the lowest polymerization temperature for the trifunctional phloroglucinol-based benzoxazine. Comparing the polymerization processes and resulting structures, the trifunctional benzoxazine derivative enter new polymerization pathways, which include methylene linkages bridging aniline units, as well as the formation of carbonyl-derived structures. View Full-Text
Keywords: benzoxazine; polybenzoxazine; thermosets; ring-opening polymerization benzoxazine; polybenzoxazine; thermosets; ring-opening polymerization

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Soto, M.; Hiller, M.; Oschkinat, H.; Koschek, K. Multifunctional Benzoxazines Feature Low Polymerization Temperature and Diverse Polymer Structures. Polymers 2016, 8, 278.

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