Highly Crosslinked Polybenzoxazines from Monobenzoxazines : The Effect of Meta-Substitution in the Phenol Ring
Martos, Alba (Universitat Autònoma de Barcelona. Departament de Química)
Soto, Marc (Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM)
Schäfer, Hannes (Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM)
Koschek, Katharina (Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM)
Marquet, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Sebastián Pérez, Rosa Maria (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2020
Abstract:	It is possible to control the crosslink density of polymers derived from monobenzoxazines by switching the type of substituents in the phenolic ring and their relative position with respect to the phenol group. We prepared several substituted monobenzoxazines in the para and meta positions of the phenolic ring and studied how these substituents affected the polymerization temperature of monomers and the thermal stability of the final polymers and, more extensively, how they affected the crosslink network of the final polymers. Gel content and dynamic mechanical analysis confirm that ortho- and para-orienting substituents in the meta position generate highly crosslinked materials compared to para ones. This fact can lead to the design of materials with highly crosslinked networks based on monobenzoxazines, simpler and more versatile monomers than the commercial bisbenzoxazines currently in use.
Grants:	Ministerio de Economía y Competitividad CTQ2015-65439-R Ministerio de Economía y Competitividad 2016-81797-REDC Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-465
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Monobenzoxazines ; Para and meta phenols ; Thermosets ; Crosslinking ; Thermal stability ; Gel content ; Phenolic catalyst ; Differential scanning calorimetry ; Dynamic mechanical analysis
Published in:	Polymers, Vol. 12, Num. 2 (Febrer 2020) , art. 254, ISSN 2073-4360

DOI: 10.3390/polym12020254
PMID: 31973239

13 p, 1.6 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group in Electrochemistry, Photochemistry and Organic Reactivity (GEFRO)
Articles > Research articles
Articles > Published articles