Abstract This article proposes the preparation and microwave thermal cured (MTC) epoxy-modified phenolic fibers for first time. Epoxy-modified thermoplastic resin was prepared in acidic condition using phenol, formaldehyde, epichlorohydrin as reactants, then underwent additive reaction with formaldehyde to obtain thermosetting resin, which converted into nascent through wet spinning. Finally, w...

The polymerization of resin adhesives, which is highly nonlinear, is chosen as a process control system. When phenol and formaldehyde are mixed, a sudden and unpredictable heat is produced due to an exothermic reaction, which could cause the deviation of process temperature and hence diminish the product quality. Hence, temperature control is necessary for exothermic batch reactor. The most com...

Chestnut fruit shell and ground coffee waste were evaluated as filler raw materials for plywood adhesive. A phenol-formaldehyde (PF) resin was formulated in the laboratory manufacture. Specification characteristics determined on PF resin, including nonvolatile solids, gel time, viscosity, etc. The synthesized mixed with extender, NaOH. Plywoods uniformly made mixture tested tension shear streng...

This work deals with the influence of specific pressure during the press process on the radial and tangential penetration of urea-formaldehyde (UF) adhesive into poplar, as well as on the shear strength of lap joints prepared at these different pressures. An epi-fluorescence microscope was used for measuring the adhesive penetration when investigating microtome slides (20-μm thick) cut from the...

Conventional carbon fiber reinforced phenolic resins are widely used to prepare carbon/carbon composites due to their high carbon yield. Property enhancement of carbon fabric/phenolic composites is possible through carbon nanomaterial dispersion in the matrix. The effect of carbon nanofiber dispersion in phenolic resins/carbon fabric composites was investigated. The dispersion efficiency in dif...