The reason why modified phenyl silicone oil with high phenyl content has excellent high temperature resistance is mainly attributed to its unique chemical structure and composition. The following is a detailed analysis of its high temperature resistance mechanism:
1. Chemical structure basis
Modified phenyl silicone oil with high phenyl content is mainly composed of silicon oxygen bond (Si-O) and phenyl (C6H5-). The silicon oxygen bond itself has a high bond energy, which makes the silicone oil molecule still stable at high temperatures. At the same time, as an organic group, the introduction of phenyl increases the rigidity of silicone oil molecules and further improves the high temperature resistance of silicone oil.
2. High temperature resistance mechanism
Stability of silicon oxygen bond:
The bond energy of silicon oxygen bond is high, which makes silicone oil molecules not easy to break at high temperature, thereby maintaining the stability of silicone oil.
The bond angle of silicon oxygen bond is large, which makes the silicone oil molecular chain have a large degree of freedom and can maintain good fluidity at high temperature.
"Protective umbrella" effect of phenyl group:
As an organic group, the introduction of phenyl group can increase the steric hindrance of silicone oil molecules, thereby preventing the silicone oil molecules from polymerizing or cross-linking at high temperatures.
Phenyl group also has certain antioxidant properties, which can slow down the oxidative degradation rate of silicone oil at high temperatures.
Enhanced rigidity of molecular chain:
The introduction of phenyl group enhances the rigidity of silicone oil molecules and improves the thermal stability of silicone oil molecules.
The rigid molecular chain is not easy to deform or break at high temperatures, thus maintaining the high temperature resistance of silicone oil.
3. Application fields
Due to its excellent high temperature resistance, high phenyl content modified phenyl silicone oil is widely used in various high temperature environments in the fields of lubrication, sealing, insulation, etc. For example, in the aerospace, automobile manufacturing and other industries, high temperature phenyl silicone oil is used as high temperature lubricant, sealing material and insulating oil.
4. Conclusion
In summary, the high temperature resistance mechanism of high phenyl content modified phenyl silicone oil is mainly due to its unique chemical structure and composition. The stability of silicon oxygen bond, the "protective umbrella" effect of phenyl group and the enhanced rigidity of molecular chain together constitute the basis of its high temperature resistance. These characteristics enable high phenyl content modified phenyl silicone oil to maintain stable performance in high temperature environments, thus meeting the needs of various high temperature applications.