What is the effect of the change of Phenolics content on the electrical insulation performance of Rosin modified phenolic resin?
Publish Time: 2024-10-11
Rosin modified phenolic resin has a wide range of applications in the electrical field, and the change of Phenolics content has an important effect on its electrical insulation performance.
When the Phenolics content is low, the electrical insulation performance of Rosin modified phenolic resin may be limited to a certain extent. Phenolics has a certain polarity, and too low a content may cause the binding force between resin molecules to be not tight enough, so that the resin is prone to tiny conductive channels under the action of the electric field. This will reduce the insulation resistance of the resin, increase the risk of leakage, and make it difficult to effectively block the passage of current.
However, with the appropriate increase of Phenolics content, the situation will improve. The right amount of Phenolics can participate in the cross-linking reaction of the resin to form a more stable and compact molecular structure. This structure can better prevent the migration of charges, improve the insulation resistance and dielectric strength of the resin, and enhance its electrical insulation performance. For example, within a certain range, the increase of Phenolics can keep the resin at a low current leakage under high electric field strength, ensuring the normal operation of electrical equipment.
However, if the Phenolics content is too high, it may also have an adverse effect on the electrical insulation performance. Too much Phenolics may cause the crystallinity of the resin to decrease, the molecular structure to become too complex, and may even introduce some impurities or defects. This will destroy the uniformity and density of the resin, provide more pathways for the transfer of charge, and thus reduce its insulation performance.
In addition, changes in the Phenolics content may also affect the heat resistance and moisture resistance of Rosin modified phenolic resin, which are also closely related to electrical insulation performance. For example, poor heat resistance may cause the resin to deform or decompose easily under high temperature conditions, thereby affecting its insulation effect; poor moisture resistance may cause the resin to absorb moisture and reduce insulation resistance.
In summary, the Phenolics content has a complex effect on the electrical insulation performance of Rosin modified phenolic resin. In practical applications, it is necessary to accurately control and optimize the Phenolics content to obtain the best electrical insulation performance to meet the needs of different electrical equipment. At the same time, other performance indicators need to be comprehensively considered to ensure that the resin can stably and reliably perform its insulation function under various environmental conditions.
