Preparation and characterization of a low‐formaldehyde‐emission methylol urea/triethanolamine copolymer composite

Abstract

A low-formaldehyde-emission methylol urea/triethanolamine composite was synthesized through in situ esterification of formaldehyde with triethanolamine and subsequent copolymerization of the synthesized polyester with methylol urea. The effects of the addition of triethanolamine to the polymerization process on some physical properties of the synthesized copolymer were evaluated. The copolymer was characterized with IR spectroscopy and macrophase-separation techniques. At a given triethanolamine concentration, the composite exhibited macrophaseseparation behavior between that of pure methylol urea and pure polyester. IR spectra showed the presence of the polyester moiety in the composite. The values of the moisture uptake, formaldehyde emission, melting point, and elongation at break of the copolymer were within acceptable levels required in the coating industry. Therefore, the methylol urea/polyester copolymer resin could have potential as a binder in the coating industry.

Guar gum based biodegradable, antibacterial and electrically conductive hydrogels

“…This may be attributed to the increase in the number of collisions between the monomer and the backbone molecules that resulted in increased viscosity of the reaction medium at higher temperature. Viscous reaction medium inhibited the mobility of monomer species toward backbone and resulted in the formation homopolymer [34][35][36]. Further the kinetic energies of the free radicals increased with increase in temperature and increased kinetic energy resulted in increased collisions among live chains and occurred in termination of chain reactions.…”

Kinetics of Thermal Degradation of Raw Lacquer Enhanced by Formaldehyde Urea Prepolymer

“…In previous research, formaldehyde and lacquer could react to forming form the network structure, and the urushiol-formaldehyde polymer (UFP). Through this way, lacquer of dry time and other basic performance -3-all could be improved [22][23][24] . Inspired by the above research, formaldehyde-urea polymer (FUP) has abundant hydrophilic amino groups and methylol groups, which may have the same effect.…”

Dynamic mechanical analysis of urea formaldehyde resin modified by ammonium pentaborate as wood adhesive

“…The most popular and effective solutions to limit formaldehyde release as reported in open literatures including the modification of formulation of UF and its synthesis procedure, such as reducing the molar ratio of formaldehyde to urea (F/U) or increasing the charging steps of formaldehyde. Another common method is to optimize hot pressing parameters during the wood composites manufacture, and introduce formaldehyde scavengers additives such as acrylamide , triethanolamine , nano‐SiO 2 , cyclopentylamine, methylamine, ethylamine, etc. and melamine .…”