C-13 NMR Study of Presence of Uron Structures in Amino Adhesives and Relation with Wood-Based Panels Performance

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Nuno A. Costa (Author) FEUP; Daniela Martins (Author) Other; João Pereira (Author) Other; Jorge Martins (Author) FEUP; João Ferra (Author) FEUP; Paulo Cruz (Author) Other; Adélio Mendes (Author) FEUP; Fernão D. Magalhães (Author) FEUP; Luísa H. Carvalho (Author) FEUP

Journal

Title: Journal of Applied Polymer Science

Vol. 130 No. 6

Pages: 4500-4507

ISSN: 0021-8995

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 9 Citations

ISI Web of Science

Scopus - 11 Citations

INSPEC

Scientific classification

FOS: Natural sciences > Chemical sciences

Associated Projects

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

ECOUF - ECOUF - Desenvolvimento de resinas ureia-formaldeído de nova geração com baixa emissão de formaldeído

Other information

Authenticus ID: P-008-ER2

DOI: 10.1002/app.39688

Abstract (EN): The chemical structure of amino adhesives produced by the strongly acid process was investigated by C-13 Nuclear Magnetic Resonance spectroscopy. This technique allowed the identification of functional groups and its quantitative determination. Concentration of cyclic polymeric structures (urons) was shown to be related with adhesive performance and with particleboard physico-mechanical properties and formaldehyde content. Higher urons concentration presented lower viscosity and reactivity. Particleboards produced with resins with lower urons concentration presented lower formaldehyde content, but also lower internal bond strength. Wood-based panels produced fulfilled E1 class requirements for formaldehyde emissions, indicating that strongly acid process is an alternative to the conventional alkaline-acid process. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4500-4507, 2013

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8