Introducing Flexibility in Urea-Formaldehyde Resins: Copolymerization with Polyetheramines

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Ana Antunes (Autor) Outra; Maria Rêgo (Autor) Outra; Nádia Paiva (Autor) Outra; João Ferra (Autor) Outra; Jorge Martins (Autor) Outra; Luísa Carvalho (Autor) FEUP; Ana Barros Timmons (Autor) Outra; Fernão D. Magalhães (Autor) FEUP

Revista

Título: Journal of Polymer Science, Part A: Polymer Chemistry

Vol. 56 Nº 16

Páginas: 1834-1843

ISSN: 0887-624X

Editora: John Wiley & Sons

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 7 Citações

INSPEC

Projetos Associados

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

2GAR - 2GAR - Resinas Amino de segunda Geração

Outras Informações

ID Authenticus: P-00P-HF2

DOI: 10.1002/pola.29064

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10