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Open AccessArticle

Cerium Salts: An Efficient Curing Catalyst for Benzoxazine Based Coatings

1
Laboratory of Polymeric and Composite Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), Materia Nova Research Center & University of Mons, 23 Place du Parc, B-7000 Mons, Belgium
2
Department of Visual Communication Design, School of Art & Design, Zhejiang Sci-Tech University, Hangzhou 310018, China
3
Department of Materials Science, Materials Engineering Research Center (CRIM), University of Mons, 23 Place du Parc, B-7000 Mons, Belgium
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(2), 415; https://doi.org/10.3390/polym12020415
Received: 29 November 2019 / Revised: 17 January 2020 / Accepted: 23 January 2020 / Published: 11 February 2020
(This article belongs to the Special Issue Thermosets II)
The effect of three different cerium salts (Ce(NO3)3.6H2O, CeCl3.7H2O and Ce(OOCCH3)3.5H2O) on the ring-opening polymerization (ROP) of a model diamine-based benzoxazine (4EP-pPDA) was investigated. With the incorporation of the cerium salts, the curing temperature of 4EP-pPDA is reduced substantially, and the glass transition temperatures of the resulting networks are increased significantly. The three cerium salts exhibit different catalytic activities, which were analyzed by FT-IR, NMR, and energy-dispersive X-ray (EDX). Ce(NO3)3.6H2O was found to exhibit the best catalytic effect, which seems to be related to its better dispersibility within 4EP-pPDA benzoxazine precursors.
Keywords: benzoxazine; cerium salt; ROP; catalyst; low curing temperature benzoxazine; cerium salt; ROP; catalyst; low curing temperature
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MDPI and ACS Style

Zhang, T.; Bonnaud, L.; Raquez, J.-M.; Poorteman, M.; Olivier, M.; Dubois, P. Cerium Salts: An Efficient Curing Catalyst for Benzoxazine Based Coatings. Polymers 2020, 12, 415.

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