This article presents the thermal stability of flax, jute and ultrahighmolecular weight polyethylene (UHMWPE) fibers their composites. Composites are fabricated using a combination hand layup compression moulding. Two types resins namely phenol formaldehyde (PF) melamine (MF) considered. Stacking eight layers individual fabric was utilised to produce composite panels 4 mm thickness. Alkali trea...

Resorcinol-formaldehyde resin is a material used in endodontic therapy in many foreign countries. With immigration to the United States increasing, American dentists need to become familiar with resorcinol-formaldehyde therapy. It contains two potentially toxic components, formaldehyde (liquid) and resorcinol (powder). Zinc oxide or barium sulfate may be used for radiopacity. When 10% sodium hy...

A new, easy and cost-effective synthetic procedure for the preparation of thermosetting melamine-based epoxy resins is reported. By this innovative synthetic method, different kinds of resins can be obtained just by mixing the reagents in the presence of a catalyst without solvent and with mild curing conditions. Two types of resins were synthesized using melamine and a glycidyl derivative (res...

Glycolaldehyde, produced from cracking of glucose, was tested as a substitute for formaldehyde in urea-based wood adhesives. Initially, different parameters (water content, aldehyde/urea-ratio, curing temperature, and time) were screened to identify the optimal conditions providing highest bond strength. Afterwards, system reformulated 2-component compared urea-formaldehyde system, which showed...

Surface finishing operation is a very vital aspect of the manufacturing process and would not fully be achieved without abrasives such as emery paper. Some materials used in production like alumina (Al2O3), Boron Carbide (B4C) are expensive thereby limiting their usage. This work aimed at producing abrasive from snail shells, silica (SiO2), epoxy resin while melamine formaldehyde acts hardener....

Paraffinic phase change materials (PCM) were microencapsulated by in situ polymerization of melamine-formaldehyde prepolymers. Partly methylated trimethylolmelamine was used as an aminoaldehyde prepolymer for the microcapsule wall, a styrene-maleic acid anhydride copolymer as an emulsifier and modifying agent, and ammonia as a scavenger for reducing residual formaldehyde. For the determination ...