title: Suppression Effect and Mechanism of Platinum and Nitrogen-Containing Silane on the Tracking and Erosion of Silicone Rubber for High-Voltage Insulation.
abstract: How to effectively improve the tracking and erosion resistance of silicone rubber (SR) was an urgent topic in the field of high-voltage insulation. In this work, the tracking and erosion resistance of SR was significantly improved by incorporating platinum (Pt) catalyst and nitrogen-containing silane (NS). The suppression effect and mechanism of Pt/NS on tracking and erosion were studied by inclined plane (IP) test, thermogravimetry (TG), thermogravimetry-Fourier transform infrared spectrometry, laser Raman spectroscopy, and scanning electron microscopy. It revealed that when 1.4 phr of NS and 6.7 ppm of Pt were added, the tracking resistance of SR was improved from 2.5 to 4.5 kV level in the IP test, and the eroded mass was significantly reduced. This might be attributed to the synergistic effect of Pt/NS on silicone chains. At a high temperature produced by arc discharge, Pt/NS would catalyze radical cross-linking, meanwhile suppressing oxidation and depolymerization of silicone chains. Hence, a tightly cross-linked network was formed and protected inner materials from arc ablation. Moreover, carbon deposit during pyrolysis was suppressed by Pt/NS, which served as the secondary mechanism of tracking suppression.
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Wan Juan
authors.initials: WJ
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Xingrong
authors.initials: X
authors.lastname: Zeng
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Lai
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Li
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Wei Zhen
authors.initials: WZ
authors.lastname: Fang
authors.affiliation: College of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Hou
keywords: TG-FTIR; inclined plane test; nitrogen-containing silane; platinum; silicone rubber; tracking and erosion resistance