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
-
Polyester adhesive can be built into yarn or turn to adhesive product, this adhesive good for gluing many kind of plastics but better if gl...
-
Urea formaldehyde as wood glue have characteristics such as low cost for hude application, low cure temperature, resistance to microorgani... -
Double tape for mounting object on the wall or to stick steel on other steel, see here before you decide to choose the right double tape: 3M... -
Find some double tape product that is sold in the market. Compare the price of many double sided tape trade mark that sold in online shop i...
-
Performance of urea-formaldehyde (UF) resin can be improved by modified low molar ratio UF resins were developed to improve water resistan...
No comments:
Post a Comment