; automobile tires to improve the bonding of rubber to tire cord; paper to improve the tear strength, especially of wet paper; and alkyds and acrylics to improve their cure. The ability of formaldehyde to form resinous polymers had been observed by chemists in
Authors:Jiang Jinxue, Yang Yonglin, Li Cheng, and Li Jianzhang
in the manufacture of wood-based panels.
Urea–formaldehyde (UF) resin is the most widely used polycondensation resins today in wood-based panels industry due to some advantages such as fast curing, good performance in the panel, and cost
Recently, we have synthesized a novel self-crosslinked terpolymer derived from 4-acetylpyridine oxime, acetophenone, and formaldehyde which was excellent thermal stability and antimicrobial activity for biomedical applications [ 13 ]. Also
Authors:Gonzalo Vázquez, Jorge Santos, M. Sonia Freire, Gervasio Antorrena, and Julia González-Álvarez
, there is a worldwide concern on the use of formaldehyde due to its suspected carcinogenic effect. For this reason, new technologies are being investigated to modify the traditional tannin–formaldehyde adhesive systems actually used, not only to prevent
Authors:Stefano Dugheri, Alessandro Bonari, Ilenia Pompilio, Marco Colpo, Nicola Mucci, Manfredi Montalti, and Giulio Arcangeli
Development of an Innovative Gas Chromatography—Mass Spectrometry Method for Assessment of Formaldehyde in the Workplace Atmosphere
S. Dugheri et al.
Formaldehyde (FA), a colorless gaseous
Authors:G. Vázquez, F. López-Suevos, J. González-Alvarez, and G. Antorrena
Phenol-urea-formaldehyde-tannin (PUFT) adhesives have been prepared by copolymerization at room temperature of pine bark tannins
with phenol-urea-formaldehyde (PUF) prepolymers prepared under varying operating conditions. Differential scanning calorimetry
(DSC) and dynamic mechanical analysis (DMA) have been used to analyse the curing of prepolymers and adhesives. DSC curves
were obtained at three different heating rates and, by means of the Model Free Kinetics isoconversional method, chemical conversion
vs. time at a given temperature was obtained. Mechanical conversion was calculated from DMA storage modulus data for those
adhesives which gave the best results for plywood and MDF boards.
Authors:T. Zorba, E. Papadopoulou, A. Hatjiissaak, K. Paraskevopoulos, and K. Chrissafis
Urea-formaldehyde (UF) resins are the most used polycondensation resins today, in manufacturing particleboards. UF resins
possess some advantages such as fast curing, good performance in the panel, water solubility and low price. However, the main
chemical bonds of the UF resins macromolecules are hydrolysis sensitive. This causes low water and mositure resistance performance
and subsequent formaldehyde release from the UF-bonded panels. A multitude of pathways have been explored for the improvement
of UF resins’ behavior relating either to their synthesis procedure or application parameters during panel manufacture. In
this study, two UF resins (a conventional and an innovative one produced at very low pH and temperature conditions) were analyzed
for their specifications and characterized with TG-DTA technique in dynamic heating conditions and FTIR measurements both
in their pre-polymer and cured state.