Flame Retardancy and Excellent Electrical Insulation Performance of RTV Silicone Rubber

Room temperature vulcanized (RTV) silicone rubber filled with aluminum trihydrate (ATH) is substantially engaged in electrical outdoor insulation applications. The pristine silicone rubber is highly combustible. ATH filled silicone rubber offers excellent electrical insulation but lacks in providing...

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Bibliographic Details
Published in:Polymers 2021-08, Vol.13 (17), p.2854
Main Authors: Nazir, Muhammad Tariq, Khalid, Arslan, Kabir, Imrana, Wang, Cheng, Baena, Juan-Carlos, Akram, Shakeel, Bhutta, Muhammad Shoaib, Yasin, Ghulam, Phung, Bao Toan, Yeoh, Guan Heng
Format: Article
Language:English
Subjects:
Aluminum
Breakdowns
Carbon
Communication
Dielectric breakdown
Dielectric loss
Dielectric strength
Electrical insulation
Flame retardants
Flammability
Graphene
Heat release rate
Pollution
Preventive maintenance
Room temperature
Rubber
Silicone resins
Silicone rubber
Silicones
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Summary:Room temperature vulcanized (RTV) silicone rubber filled with aluminum trihydrate (ATH) is substantially engaged in electrical outdoor insulation applications. The pristine silicone rubber is highly combustible. ATH filled silicone rubber offers excellent electrical insulation but lacks in providing adequate flame retardancy. This short communication reports the novel results on improved flame retardancy of pristine and ATH filled silicone rubber whilst retaining the electrical insulation properties to a great extent. Results suggest that the presence of only one percent of graphene nanoplatelets with ATH sharply reduces the heat release rate and rate of smoke release. A minor reduction in dielectric breakdown strength and volume resistivity is noticed. Furthermore, permittivity and dielectric loss at power frequency suggest that a marginal 1% concentration of nanoplatelet with ATH is an excellent approach to fabricate flame retardant silicone rubber with an acceptable electrical insulation level.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13172854