Suppression Effect and Mechanism of Amine-Containing MQ Silicone Resin on the Tracking and Erosion Resistance of Silicone Rubber | Zendy

Yajun Zhang | Zendy; Xingrong Zeng | Zendy; Xuejun Lai | Zendy; Hongqiang Li | Zendy; Quan Zhou | Zendy; Xiaoyi Huang | Zendy

Open Access

Suppression Effect and Mechanism of Amine-Containing MQ Silicone Resin on the Tracking and Erosion Resistance of Silicone Rubber

Author(s) -

Yajun Zhang,

Xingrong Zeng,

Xuejun Lai,

Hongqiang Li,

Quan Zhou,

Xiaoyi Huang

Publication year - 2017

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.7b00904

Subject(s) - silicone rubber , materials science , thermogravimetry , attenuated total reflection , fourier transform infrared spectroscopy , composite material , x ray photoelectron spectroscopy , vulcanization , raman spectroscopy , ultimate tensile strength , silicone resin , scanning electron microscope , analytical chemistry (journal) , chemical engineering , natural rubber , chemistry , organic chemistry , engineering , physics , optics , coating

How to effectively enhance the antitracking performance of silicone rubber is a huge challenge in the field of high-voltage insulation. In this contribution, amine-containing MQ silicone resin (A-MQ) was prepared to enhance the tracking and erosion resistance of addition-cure liquid silicone rubber (ALSR). The results showed that A-MQ imparted ALSR with excellent tracking and erosion resistance. When A-MQ content was 4 phr, all test samples passed the inclined plane test at 4.5 kV, and the erosion mass decreased by 67.8%. In addition, the tensile strength and tear strength increased by 13.2 and 13.6%, respectively, compared with that of ALSR without A-MQ. The suppression mechanism was further investigated in the aspects of heat attack and plasma bombardment by laser Raman spectroscopy, thermogravimetry, thermogravimetry-Fourier transform infrared spectrometry, scanning electron microscopy, attenuated total reflection-Fourier transform infrared spectrometry, and X-ray photoelectron spectroscopy. This revealed that at the elevated temperature caused by arc discharge, A-MQ promoted crosslinking of the polysiloxane molecules and suppressed the generation of cyclic oligomers, which reduced the intensity of the electrical arc. Moreover, when suffering from plasma bombardment, which was also produced by arc discharge, A-MQ protected the silicone chains from degradation and eliminated the carbon deposited on the surface.

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