Thermal Conductivity of Silicone Rubber Filled with Al2O3

Qiu Hong Mu; Dan Peng; Feng Wang; Jin Hui Li; Shuo Zhang

doi:10.4028/www.scientific.net/MSF.987.59

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HomeMaterials Science ForumMaterials Science Forum Vol. 987Thermal Conductivity of Silicone Rubber Filled...

Thermal Conductivity of Silicone Rubber Filled with Al₂O₃

Abstract:

Crosslinker (polyvinylsilicone oil, C gum) and curing agent (2, 5-bis (tert-butyl peroxy)-2, 5-dimethyl hexane, DBPMH) were used to change the crosslink density of the thermal conductivity of silicone rubber filled with Al₂O₃. The results show that the thermal conductivity of silicone rubber changed with its degree of crosslinking. When the Al₂O₃ loading was 5 vol. % and a completely continuous conducting network had not formed, the thermal conductivity of the vulcanizates decreased with increasing crosslink density. The thermal conductivity of the vulcanizate with a suitable amount of C gum increased to 53%, and the tensile strength increased by 0.8 MPa compared to the vulcanizate without C gum. When the Al₂O₃ loading was 30 vol. % and a completely continuous conducting network had formed, the crosslink density of vulcanizates changed as the amount of DBPMH changed. The thermal conductivity of vulcanizates first decreased and then increased with increasing crosslink density. There was a valley value in the thermal conductivity–crosslink density curve.

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International Symposium on Advanced Material Research III

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Periodical:

Materials Science Forum (Volume 987)

Pages:

59-63

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.987.59

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Online since:

April 2020

Authors:

Qiu Hong Mu*, Dan Peng, Feng Wang, Jin Hui Li, Shuo Zhang

Keywords:

Al₂O₃, Crosslinking, Modulus, Silicone Rubber, Thermal Conductivity

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