نتایج جستجو برای: urea formaldehyde resin
تعداد نتایج: 77915 فیلتر نتایج به سال:
Over the past few decades, climate change and search for renewable energy sources have become hot topics within research community. About 30% of world's consumption is in heating cooling sector residential buildings. Such materials can reduce temperature variations, leading to an improvement human comfort decreasing at same time This paper assesses integration a microencapsulated phase material...
Abstract Wood modification is an excellent way to improve material properties, prolong service life, and pave the for new applications timber in built environment. The aim of this study establish influence wood species process with phenol urea formaldehyde resin. Seven hardwoods four softwoods were compared identical treatment. Since main variable, provides a clear insight as its on modificatio...
The objective of this preliminary study was to partially replace phenol in the synthesis of phenol-formaldehyde resin with feather protein. Feather protein–based resins, which contained one part feather protein and two parts phenol, were formulated under the conditions of two feather protein hydrolysis methods (with and without presence of phenol during hydrolysis), two formaldehyde/phenol mola...
This paper describes the carbonization behavior of phenol-formaldehyde resin (PF) blended in the presence of simple organic substances of m-phthalic acid (PA), trimesic acid (TMA) and phloroglucinol (PG). The weight loss and heat flow were monitored in order to study their carbonization behavior by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC), respectively. These ...
a chelating resin is prepared by condensation polymerization of aniline with formaldehyde andcharacterized by ft-ir, elemental analysis and studied for the preconcentration and determination of traceplatinum ion from environmental water sample using inductively coupled plasma-atomic emission spectroscopy(icp-aes). the optimum ph value for sorption of the metal ions was 5. the maximum adsorption...
This article presents the first applied results of using citric acid in combinations with a melamine-urea-formaldehyde (MUF) resin for bonding wood veneers. The chemical reactions involved are shown based on MALDI ToF analysis reaction MUF acid. preliminary physical and mechanical properties LVL prepared also presented. Veneers from Populus sp were used to manufacture 5-layer laminated veneer l...
Berlin, A. and Smeets, J. (1974). European intercomparison programmes and harmonization oftechniqueswith special reference to heavy metals in biological fluids. Presented at the Fourth Annual Symposium onRecent Advances in the Analytical Chemistry of Pollutants, Basle, Switzerland. Bryce-Smith, D. (1972). Behavioural effects of lead and other heavy metal pollutants. Chemistry in Britain, 8, 240...
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