Global ETD Search
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Showing 1 to 8 of 8 for “"phenol formaldehyde resin"”.
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Production of phenol-formaldehyde resin composites
… the production of industrial laminates based on phenol-formaldehyde resins, with a view of suggesting ways of improving the process economics and/or the physical properties of the final product. Aspects of impregnation, drying, and lamination were investigated. The resins used in all experiments …
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Evaluation of Phenol Formaldehyde Resin Cure Rate
… to characterize the cure rate of two commercial phenol-formaldehyde adhesives. Two methods are used, parallel-plate rheometry and dielectric spectroscopy. Viscosity data from a parallel-plate rheometer may be used to track the advance of polymerization as a function of temperature. This data can …
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Cure of aqueous phenol-formaldehyde resin at elevated water vapor pressures
… research was to enhance our knowledge of aqueous phenolformaldehyde resin cure as it is affected by the elevated water vapor pressures that occur during hot-pressing of a wood-based composite. Microdielectric spectroscopy (DEA) was used to monitor the cure reaction, and thermomechanical analysis …
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The effect of hot-pressing parameters on resin penetration and flakeboard layer properties
The area of penetration of phenol-formaldehyde resin into aspen (<i>Populus tremuloides</i>) and Douglas-fir (<i>Pseudotsuga menziesii</i>) flakes, and the layer properties of yellow poplar (<i>Liriodendron tulipifera</i>) flakeboard were investigated to determine how they were influenced by …
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Wood liquefaction in the presence of phenol with a weak acid catalyst and its potential for novolac type wood adhesives
Wood liquefaction was conducted using phenol as a reagent solvent with oxalic acid as a catalyst. A series of studies were done on liquefied wood, liquefied wood residues, novolac-type liquefied wood resins, and bio-composites fabricated from liquefied wood resin. The results of the liquefied wood …
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The evaluation of an organophosphate thermosetting resin for use in a high temperature resistant composite and a study of chemistry of ionomer cements
… to improve the high temperature performance of phenol-formaldehyde thermosets by modification of their structure with inorganic phosphate groups. Transesterification of tri-phenyl phosphate with resorcinol has given a resorcinol phosphate resin, which cured with hexamethylenetetramine. A pilot …
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Scale-bridging molecular dynamics simulations of plasma-surface interactions
… edge of the Orion multi-purpose crew vehicle. Phenol formaldehyde resin used as the matrix material in AVCOAT is modeled and its pyrolysis kinetics are determined using ReaxFF-based molecular dynamics (MD) simulations. Our MD simulations show that bulk pyrolysis starts at temperatures of ∼500 …
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Effect of Cellulose Nanocrystals on the Rheology, Curing Behavior, and Fracture Performance of Phenol-Formaldehyde Resol Resin
… additives, on the properties and performance of phenol–formaldehyde (PF) adhesive resin. The steady-state viscosity of a commercial PF resol resin and three CNC–resin mixtures, containing 1–3 wt % CNCs, based on solids content, was measured with a rheometer as a function of shear rate. The …