Production of melamine fortified urea-formaldehyde resins with low formaldehyde emission

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Nádia T. Paiva (Autor) FEUP; Ana Henriques (Autor) FEUP; Paulo Cruz (Autor) Outra; João M. Ferra (Autor) FEUP; Luísa H. Carvalho (Autor) FEUP; Fernão D. Magalhães (Autor) FEUP

Revista

Título: Journal of Applied Polymer Science

Vol. 124 Nº 3

Páginas: 2311-2317

ISSN: 0021-8995

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 44 Citações

ISI Web of Science

Scopus - 56 Citações

COMPENDEX

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia de materiais

Projetos Associados

EO_Formaldehyde - Concepção de sistemas adesivos taylor-made para o fabrico de painéis de madeira de baixa emissão de formaldeído

Outras Informações

ID Authenticus: P-002-A4Z

DOI: 10.1002/app.35282

Abstract (EN): Melamine can be incorporated in the synthesis of urea-formaldehyde (UF) resins to improve performance in particleboards (PB), mostly in terms of hydrolysis resistance and formaldehyde emission. In this work, melamine-fortified UF resins were synthesized using a strong acid process. The best step for melamine addition and the effect of the reaction pH on the resin characteristics and performance were evaluated. Results showed that melamine incorporation is more effective when added on the initial acidic stage. The condensation reaction pH has a significant effect on the synthesis process. A pH below 3.0 results on a very fast reaction that is difficult to control. On the other hand, with pH values above 5.0, the condensation reaction becomes excessively slow. PBs panels produced with resins synthesized with a condensation pH between 4.5 and 4.7 showed good overall performance, both in terms of internal bond strength and formaldehyde emissions. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7