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

被引：11

作者：

Costa, Nuno A. ^{[1
,2
,3
]}

Martins, Daniela ^{[1
,2
]}

Pereira, Joao ^{[1
,2
]}

Martins, Jorge ^{[1
,4
]}

Ferra, Joao ^{[3
]}

Cruz, Paulo ^{[3
]}

Mendes, Adelio ^{[1
]}

Magalhaes, Fernao D. ^{[1
]}

Carvalho, Luisa H. ^{[1
,4
]}

机构：

[1] Univ Porto, Fac Engn, LEPAE, P-4200465 Oporto, Portugal

[2] ARCP, Oporto, Portugal

[3] EuroResinas Ind Quim SA, Sines, Portugal

[4] Inst Politecn Viseu, DEMad Dept Engn Madeiras, P-3504510 Viseu, Portugal

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2013年 / 130卷 / 06期

关键词：

adhesives; composites; spectroscopy; properties and characterization; resins; UREA-FORMALDEHYDE RESINS; CHEMICAL-STRUCTURE; EMISSION; ACID;

D O I：

10.1002/app.39688

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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

引用

页码：4500 / 4507

页数：8

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