Oil bleed from elastomeric thermal silicone conductive pads

2016, Volume 10, Issue 4

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Frontiers of Chemical Science and Engineering >> 2016, Volume 10, Issue 4 doi: 10.1007/s11705-016-1586-y

Oil bleed from elastomeric thermal silicone conductive pads

. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.. Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Tianjin 300072, China.. Tianjin Laird Electronic Material Co., Ltd. Tianjin 300457, China

Accepted: 2016-09-12 Available online: 2016-11-29

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Abstract

Oil bleed is a serious problem in elastomeric thermal silicone conductive pads. The components of the oil bleed and the effect of the silicone chemical parameters on the amount of oil bleed have been determined. The main components of oil bleeds are the uncrosslinked silicones in the cured resins, which include the unreacted silicone materials and the macromolecular substances produced by the hydrosilylation reaction. Cured resins with a high crosslinking density and a high molecular weight of vinyl silicone residues had a lower amount of oil bleed. In addition, a low Si-H content also reduced the amount of oil bleed.

Keywords

oil bleed ; crosslinking density ; molecular weight ; vinyl silicones ; hydrosilicones

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