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Author(s): Ana Antunes
Maria Rêgo
Nádia Paiva
João Ferra
Jorge Martins
Luísa Carvalho
Ana Barros Timmons
Fernão D. Magalhães
Title: Introducing Flexibility in Urea-Formaldehyde Resins: Copolymerization with Polyetheramines
Issue Date: 2018
Abstract: Adhesives obtained by copolymerizing urea, formaldehyde, and difunctional polyetheramine with different molecular weights (230, 600, 900, and 2000 gmol(-1)) are presented as a more resilient alternative to conventional urea-formaldehyde resins. Urea and polyetheramine contents were varied and the resulting resins characterized by FTIR, C-13-NMR, and TGA. These resins were used for production of agglomerated cork panels, an application that demands that the binder system is flexible. Polyetheramine with molecular weight 900 g mol(-1) yielded the most promising agglomerated cork panel, with remarkable flexibility, good tensile strength, and with the E1 formaldehyde content specification for wood-based panels used in construction, according to European Standard EN 12460-5. These new thermoset adhesives have demonstrated to be capable of being used in systems where conventional formaldehyde-based resins do not perform well due to inherent high rigidity. (C) 2018 Wiley Periodicals, Inc.
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE
info:eu-repo/grantAgreement/Agência Nacional de Inovação S.A./P2020|COMPETE - Projetos em Copromoção/POCI-01-0247-FEDER-003489/2GAR - Resinas Amino de segunda Geração/2GAR
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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