| Application of ultrafine calcium carbonate powder in deacetonized RTV-1 silicone rubber |
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| DOI： |
| Key Words: ultrafine calcium carbonate; deacetonized RTV-1 silicone rubber; filler |
| Author Name | Affiliation | | HE Huo-ming | South China University of Technology | | PAN Hui-ming | South China University of Technology | | WANG Yao-lin | Guangzhou Baiyun Sealant Factory | | LI He-chang | Guangzhou Baiyun Sealant Factory |
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| Abstract: |
| The influence of the particle size and dispersion of ultrafine calcium carbonate on the properties of the deacetonized RTV-1 silicone rubber was studied. The results showed that the deacetonized RTV-1 silicone rubber with tensile strength＞1.35 MPa, elongation at break＞357% and better thixotropy could be obtained by adding a fatty acid-treated ultrafine calcium carbonate with particle size＜0.08 μm; the higher dehydration temperature during mixing might cause concentrated calcium carbonate aggregates resulting in lower tensile strength and elongation at break of silicone rubber;and the ununiformly dispersed aggregates in the system could cause stress concentration resulting in
premature fracture of silicone rubber. |
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