A Multi-Factor Aging Study on China HTV Rubber

A Multi-Factor Aging Study on China HTV Rubber

China htv rubber is a versatile material that has been widely applied in various areas such as protective sleeve, roller, household appliance parts etc.china htv rubber It can be manufactured by a variety of molding, injection and transfer processes. Its properties include good sealing, shock absorption and connection performance. It is also suitable for use in electrical insulation and lighting. Its applications are growing due to the rapid development of power generation and electrified railway systems in China.

High temperature vulcanized silicone rubber (HTV-SR) is widely employed as external insulation in composite insulators.china htv rubber The on-site operation condition of insulators is affected by various stresses such as alternating heat, corona discharge and humidity. To simulate these stress conditions, a multi-factor aging experiment was established to test the stability of HTV-SR in a laboratory setting. In this aging experiment, multiple material analysis methods including FTIR, XPS and TG were performed to study the changes of organic functional groups, element contents and micro-structures. The results indicated that HTV-SR exhibits a clear aging behavior and a quantitative correlation between the organic content and its actual service time was also revealed.

During the aging process, HTV-SR initially shows a good crosslinking degree and degradation degree.china htv rubber However, alternating thermal stress induces severe defects on the surface of HTV-SR, which promotes the diffusion of corona products and water molecules into the material. As a result, the chemical crosslinking density increases due to in-depth oxidation. The severe surface defects further deteriorate the hydrophobicity of the material.

As a result, the elongation at break of HTV-SR gradually decreases. This change reflects the gradual decomposition of molecular chains, as evidenced by FTIR analysis. In addition, the b-relaxation value of HTV-SR decreases during the aging process, possibly because heat accelerates the breaking of molecular chains.

The results of this research indicate that the aging of HTV-SR is greatly influenced by a combination of factors such as temperature cycling, corona discharge and humidity. To improve the reliability of HTV-SR, it is necessary to consider the effects of these factors during design and production. It is suggested that the aging process of HTV-SR can be improved by implementing a multi-factor aging environment, such as simultaneous temperature-cycling, corona discharge and high humidity. This will help to prevent the occurrence of serious problems during on-site operation and enhance the service life of composite insulators. Furthermore, a new characterization method for HTV-SR is proposed to predict its actual service time. This is especially useful for the re-design of composite insulators. This will significantly benefit the safety and reliability of power grids and railway systems. The new method is simple and convenient to implement, reducing the cost of testing and allowing for fast turnaround times. It is therefore recommended that this method be further developed and applied to other HTV-SR types. It is also important to note that the aging of HTV-SR affects not only its physical properties but also its chemical and mechanical characteristics.

Tags:antistatic silicone rubber | china htv rubber material | china htv silicone rubber