Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/103468
Author(s): | Nuno A. Costa Daniela Martins João Pereira Jorge Martins João Ferra Paulo Cruz Adélio Mendes Fernão D. Magalhães Luísa H. Carvalho |
Title: | C-13 NMR Study of Presence of Uron Structures in Amino Adhesives and Relation with Wood-Based Panels Performance |
Issue Date: | 2013 |
Abstract: | 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 |
Subject: | Química Chemical sciences |
Scientific areas: | Ciências exactas e naturais::Química Natural sciences::Chemical sciences |
URI: | https://repositorio-aberto.up.pt/handle/10216/103468 |
Related Information: | info:eu-repo/grantAgreement/Agência de Inovação, S.A./Projectos de I&DT em Co-Promoção/SI IDT - 5347/2008/Concepção de sistemas adesivos taylor-made para o fabrico de painéis de madeira de baixa emissão de formaldeído/EO_Formaldehyde info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/111571/2009/ECOUF - Desenvolvimento de resinas ureia-formaldeído de nova geração com baixa emissão de formaldeído/ECOUF |
Document Type: | Artigo em Revista Científica Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
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68656.pdf Restricted Access | Artigo original publicado | 484.09 kB | Adobe PDF | Request a copy from the Author(s) |
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