Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/104049
Full metadata record
DC Field | Value | Language |
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dc.creator | João M. Ferra | |
dc.creator | Adélio M. Mendes | |
dc.creator | Mário Rui N. Costa | |
dc.creator | Fernão D. Magalhães | |
dc.creator | Luísa H. Carvalho | |
dc.date.accessioned | 2022-09-14T05:34:53Z | - |
dc.date.available | 2022-09-14T05:34:53Z | - |
dc.date.issued | 2010 | |
dc.identifier.issn | 0169-4243 | |
dc.identifier.other | sigarra:63216 | |
dc.identifier.uri | https://hdl.handle.net/10216/104049 | - |
dc.description.abstract | During the last 40 years, several analytical techniques have been developed/adapted to characterize urea-formaldehyde (UF) resins. However, a great part of the research about this kind of wood adhesives has been performed by industrial producers and, thus, the main part of the existing knowledge is retained within those companies. This work describes a methodology for determining the molecular weight distribution (MWD) of UF resins using Gel Permeation Chromatography (GPC)/Size Exclusion Chromatography (SEC) with 2 detectors (differential refractive index (RI) and differential viscosity). This method permitted to characterize/distinguish commercial UF resins produced with different F/U molar ratios and to monitor the molecular weight and MWD with ageing. An HPLC method was additionally used to evaluate the fraction of unreacted urea, monomethylolurea and dimethylolurea present in commercial UF resins and measure the evolution of these three compounds with ageing. (C) Koninklijke Brill NV, Leiden, 2010 | |
dc.language.iso | eng | |
dc.rights | restrictedAccess | |
dc.subject | Engenharia química | |
dc.subject | Chemical engineering | |
dc.title | Characterization of urea-formaldehyde resins by GPC/SEC and HPLC techniques: Effect of ageing | |
dc.type | Artigo em Revista Científica Internacional | |
dc.contributor.uporto | Faculdade de Engenharia | |
dc.identifier.doi | 10.1163/016942410x501070 | |
dc.identifier.authenticus | P-003-BGZ | |
dc.subject.fos | Ciências da engenharia e tecnologias::Engenharia química | |
dc.subject.fos | Engineering and technology::Chemical engineering | |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
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63216.pdf Restricted Access | Characterization of urea-formaldehyde resins by GPC/SEC and HPLC techniques: effect of ageing | 795.93 kB | Adobe PDF | Request a copy from the Author(s) |
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