Characterization of Gibbsite Filler in HTV Silicone Rubber by Thermogravimetric Analysis

In the present research, five filled HTV silicone rubber with different ATH filler content were manufactured and analyzed by TGA measurement in Argon atmosphere. The crystal structure of ATH filler was measured by XRD analysis, based on the XRD results, it can be confirmed that ATH filler used in this research is the Gibbsite. The weight loss process of HTV silicone rubber during the TGA process was identified, two loss peaks were observed in the derivative of TGA curve, one was attributed to the dehydration of ATH filler and the other one was attributed to the pyrolyzation of silicone rubber matrix. Furthermore, a calculation method for obtaining each component weight in HTV silicone rubber based on TGA results was proposed, based on this calculation method, the detailed content information of these five HTV silicone rubber was obtained. Based on this research, it can be concluded that the TGA analysis of filled HTV silicone rubber is an effective way to obtain the weight of each component in HTV silicone rubber.