The condensation products of phenol and formaldehyde can be either potentially thermosetting and known as Resols or thermoplastic and known as Novolaks. Resol is a type of product that is formed when formaldehyde used in molar excess under alkaline condition. By reacting with sufficient additional formaldehyde under alkaline conditions, it is possible to convert a novolak to a resol. The two resol prepared in this way differ in certain physical properties, such as intrinsic viscosity, from a resol made by direct reaction of phenol and formaldehyde under alkaline conditions.
Popular Posts
-
Urea formaldehyde as wood glue have characteristics such as low cost for hude application, low cure temperature, resistance to microorgani... -
Urea Formaldehyde Resin Urea formaldehyde is a resin wood glue that is produced from the reaction of Urea and Formaldehyde. Formaldehyde...
-
Forged carbon steel often use for valve and fitting materials. Forged Pipe Fittings are developed from different material and are known for...
-
Every adhesive have certain kind of hardener, and every hardener have their own characteristic and should be used with specific condition in...
-
Silicone sealant made by DuPont (read: du pong) is a waterproof sealant. This sealant endure of extreme temperatures, helps to prevent from...
No comments:
Post a Comment