| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Effect of EPDM on Foaming Behavior and Mechanical Properties of VMQ Silicone Rubber Foam |
| PING Fan1, ZHAO Baoyan2, BAO Jinbiao1, ZHANG Li1,*
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1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
2 Textile College, Zhejiang Fashion Institute of Technology, Ningbo 315211, Zhejiang, China |
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Abstract In this work, the methyl vinyl silicone rubber(VMQ)/EPDM foams were prepared by supercritical carbon dioxide (scCO2) foaming technology. The influence of precuring time, EPDM content and saturation temperature on cell morphology and mechanical properties was investigated. The results of mechanical properties showed that the cellular structure of silicone rubber and EPDM content had a great influence on the mechanical properties. When the precuring time was 8 min, the crosslinking density was 2.7×10-5mol · cm-3, and better foaming performance and wider foaming window can be obtained. The density of VMQ-0.5EPDM (adding 0.5 EPDM to every 100 parts of silicone rubber) foamed at 60 ℃ and 10 MPa was 0.2 g/cm3 (foaming ratio is 5.7 times).Meanwhile, with reference to VMQ-0EPDM, the specific compressive strength of VMQ-0.5EPDM increased from 1.88 MPa · cm3/g to 2.51 MPa · cm3/g, with an increase of 33%.
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Published:
Online: 2023-03-27
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| Fund:Natural Science Foudation of Ningbo City (202003N4104) and Domestic Visiting Engineer Project of Colleges and Universities in Zhejiang Province in 2020 (FG2020156). |
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2023, Vol. 37 
