What is Phenolic Resin and Its Application? Phenolic resins are a kind of synthetic Thermosetting resin also called phenolic formaldehyde resin. The material was originally called Bakelite. This was effectively the primary plastic to be sold commercially and was typified by the old-style black telephones. Phenolic resins are adaptable to several applications aside from ACFs. they're mainly used in the production of circuit boards and molded products– such as laboratory countertops, pool balls, and as adhesives and coatings–friction linings, and oil well proppants. The key factors that have made Phenolic resin maintain its commercial robustness include versatility, low cost, heat and flame resistance, durability, strength and stiffness, low toxicity, and simple processing. Apart from these, phenolics are often formulated with excellent resistance from acids, organic solvents, and water for properties enhancement. Phenol formaldehyde is that the synthetic high polymers. These are formed by the reaction with phenol and substituted phenol with formaldehyde. Phenolic resins are formed by a step-growth polymerization reaction which will be either at the presence of acid or base which are used as catalysts. It is normally in a liquid state and its specific gravity varies from 1.12 to 1.16. Types of Phenolic Resin Phenolic resins are divided into two differing kinds, novolacs and resoles. Both have hightemperature stability up to 300° – 350° C, high water, and chemical stability. Phenolic resins are often dark-colored from yellow to dark red and have a superb price/performance profile. Phenolic Resol resins are prepared in conditions with the formaldehyde to phenol ratio being greater than 1 (typically 1.5). Thermosetting at 120°C (248°F) initiates crosslinking, which creates a highly networked polymeric structure with good thermal stability, hardness, and chemical resistance.
Phenolic novolac resins are prepared when the formaldehyde to phenol ratio is a smaller amount than 1 under acidic catalytic conditions. So as to realize the strong properties of PF resins, the material is thermoset with a cross-linker like hexamethylenetetramine. Phenolic resins typically range from yellow to dark-red. Phenolic resins are found in a very myriad of industrial products. They are mainly employed in the assembly of circuit boards. They are better known for the