Results 131 to 140 of about 1,411 (179)

Acidic buffering capacity and curing process of melamine-urea-formaldehyde resin

International Journal of Adhesion and Adhesives, 2021
Abstract In this work, melamine-urea-formaldehyde (MUF) resins with different melamine levels added at different stages were synthesized. The acidic buffering capacity and gel time of the MUF resins were measured. The curing behaviour of MUF resins with different acidic buffering capacities was studied by differential scanning calorimetry (DCS).
Zhongjian Ding, Zhongqiang Ding, Tianlin Ma, Hua Zhang   +3 more
openaire   +1 more source

Rheometry of aging of colloidal melamine–urea–formaldehyde polycondensates

Journal of Applied Polymer Science, 2005
AbstractAged and whitened melamine–urea–formaldehyde (MUF) resins in a colloidal state were tested with parallel‐plate rheometry to determine the extent of their viscoelastic behavior. Only in advanced colloidal states, and so only when aggregated colloidal clusters occurred, did the resins present clear indications of viscoelastic responses, as ...
Pizzi, Antonio, George, Béatrice, Zanetti, Michela, Meausoone, P.J.   +3 more
openaire   +3 more sources

The hydrolytic stability and structure of the cured melamine-urea-formaldehyde resin

The Journal of Adhesion, 2021
The hydrolysis of cured melamine-urea-formaldehyde (MUF) resin leads to the increment of formaldehyde emission of the MUF resin-bond wood boards.
Zhongjian Ding, Zhongqiang Ding, Doudou Zhang, ChangMen Chao   +3 more
openaire   +1 more source

TG-DTA study of melamine-urea-formaldehyde resins

Journal of Thermal Analysis and Calorimetry, 2008
The thermal behaviour of MUF resins from different suppliers with different content of melamine was studied, along with the 13C NMR spectroscopic analysis of resin structure and the testing of particleboards in current production at Estonian PB factory Parnu Plaaditehas AS. The chemical structure of resins from DMSO-d6 solutions was analysed by 13C NMR
K. Siimer, P. Christjanson, T. Kaljuvee, T. Pehk, I. Lasn, I. Saks   +5 more
openaire   +1 more source

Curing kinetics study of melamine–urea–formaldehyde resin

Journal of Thermal Analysis and Calorimetry, 2011
The influence of the preconditioning at different temperatures on the cure kinetics of melamine–urea–formaldehyde resins coated on stone wool was investigated under acidic conditions using differential scanning calorimetry and thermogravimetry. The higher pre-treatment temperature was applied, to which resin-coated stone wool was exposed, the lower was
Blaž Likozar, Romana Cerc Korošec, Ida Poljanšek, Primož Ogorelec, Peter Bukovec   +4 more
openaire   +1 more source

Curing behavior of melamine-urea-formaldehyde (MUF) resin adhesive

International Journal of Adhesion and Adhesives, 2015
Abstract In this work, MUF resin was tested by DMA method. It showed that G ′ curves and strain curves together could be used to predict the curing behavior of MUF resins. The study showed that sequential formulation was preferred for the preparation of MUF resins. Hardener could accelerate the curing of MUF resins.
Hong Lei, Charles E. Frazier
openaire   +1 more source

Curing kinetics study of melamine–urea–formaldehyde resin/liquefied wood

Wood Science and Technology, 2012
The objective of this research was to investigate the effect of liquefied wood (LW) on the cure kinetics and network properties of melamine–urea–formaldehyde (MUF) resins by differential scanning calorimetry. The MUF/LW compounds exhibited two distinct cross-linking processes.
Ida Poljanšek, Blaž Likozar, Nataša Čuk, Matjaž Kunaver   +3 more
openaire   +1 more source

The Effect of Nanoclay on Melamine-Urea-Formaldehyde Wood Adhesives

Journal of Adhesion Science and Technology, 2012
Abstract In this work it has been shown that the addition of small percentages of Na+-montmorillonite (Na-MMT) and organic modified-montmorillonite (O-MMT) nanoclay to thermosetting melamine-urea-formaldehyde (MUF) resins appeared to improve, considerably, their performance as adhesives for wood particleboard.
X. Zhou, A. Pizzi, G. Du
openaire   +1 more source

Blocked melamine–urea–formaldehyde resins and their usage in agglomerated cork panels

Journal of Applied Polymer Science, 2018
ABSTRACTCaprolactam and o‐p‐toluenesulfonamide are tested as chain‐growth blockers for melamine–urea–formaldehyde (MUF) resins, in an attempt to reduce the crosslinking density of the cured resin and hence improve its flexibility. Agglomerated cork panels, for which flexibility is a technical demand, were produced with the modified resins and tested ...
Ana Antunes, Ana Gomes, Nádia Paiva, João Ferra, Jorge Martins, Luísa Carvalho, Ana Barros‐Timmons, Fernão D. Magalhães   +7 more
openaire   +2 more sources

High-intensity ultrasound assisted manufacturing of melamine-urea-formaldehyde/paraffin nanocapsules

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019
Abstract The average diameters of encapsulated phase change materials (PCMs) affect their physical properties. In this study, the effects of the main emulsification variables (ultrasound time and output power of ultrasonic treatment) were explored and then melamine-urea-formaldehyde (MUF)/paraffin nanocapsules were obtained via an in-situ ...
Shenjie Han, Shaoyi Lyu, Siqun Wang, Feng Fu   +3 more
openaire   +1 more source