High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate
The ceramifiable silicone rubber (SR) composite is prepared using boron oxide, calcium silicate, and kaolin as ceramifiable fillers. The effects of the content of CaSiO3/B2O3 on the high-temperature properties of composites are investigated. In the process of decomposition and oxidation of the ceram...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-07-01
|
| Series: | e-Polymers |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/epoly-2022-0051 |
| _version_ | 1818027432494497792 |
|---|---|
| author | Wang Xiaotian Qin Yan Zhao Chenglong |
| author_facet | Wang Xiaotian Qin Yan Zhao Chenglong |
| author_sort | Wang Xiaotian |
| collection | DOAJ |
| description | The ceramifiable silicone rubber (SR) composite is prepared using boron oxide, calcium silicate, and kaolin as ceramifiable fillers. The effects of the content of CaSiO3/B2O3 on the high-temperature properties of composites are investigated. In the process of decomposition and oxidation of the ceramifiable SR composite in air, B2O3, and low-melting-point glass frit that participate in the formation of the residue network structure in different temperature regions, it continuously produces a liquid phase during the process of the ceramifying transformation. Microscopic images reveal that different structures are formed at different temperatures. The network structure of the ceramic residue becomes increasingly compact with the increase in temperature from 600°C to 800°C, which has a better protective effect on heat transfer and mass loss. At 900°C, with the lattice reconstruction of calcium silicate and the change of crystal structure, volume expansion occurs after cooling, alleviating the volume shrinkage caused by ceramic phase formation in the process of ablation. When the ratio of CaSiO3/B2O3 reaches 1:1 (both are 15 phr), the bending strength and linear shrinkage of the composites reach a satisfactory balance, the bending strength and the shrinkage reach 18.5 MPa and 12.1%, respectively. |
| first_indexed | 2024-12-10T04:47:48Z |
| format | Article |
| id | doaj.art-5ddacafbfee34795bd2bc85b86b8e025 |
| institution | Directory Open Access Journal |
| issn | 1618-7229 |
| language | English |
| last_indexed | 2024-12-10T04:47:48Z |
| publishDate | 2022-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | e-Polymers |
| spelling | doaj.art-5ddacafbfee34795bd2bc85b86b8e0252022-12-22T02:01:41ZengDe Gruytere-Polymers1618-72292022-07-0122159560610.1515/epoly-2022-0051High-temperature behavior of silicone rubber composite with boron oxide/calcium silicateWang Xiaotian0Qin Yan1Zhao Chenglong2School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, ChinaSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan, ChinaSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan, ChinaThe ceramifiable silicone rubber (SR) composite is prepared using boron oxide, calcium silicate, and kaolin as ceramifiable fillers. The effects of the content of CaSiO3/B2O3 on the high-temperature properties of composites are investigated. In the process of decomposition and oxidation of the ceramifiable SR composite in air, B2O3, and low-melting-point glass frit that participate in the formation of the residue network structure in different temperature regions, it continuously produces a liquid phase during the process of the ceramifying transformation. Microscopic images reveal that different structures are formed at different temperatures. The network structure of the ceramic residue becomes increasingly compact with the increase in temperature from 600°C to 800°C, which has a better protective effect on heat transfer and mass loss. At 900°C, with the lattice reconstruction of calcium silicate and the change of crystal structure, volume expansion occurs after cooling, alleviating the volume shrinkage caused by ceramic phase formation in the process of ablation. When the ratio of CaSiO3/B2O3 reaches 1:1 (both are 15 phr), the bending strength and linear shrinkage of the composites reach a satisfactory balance, the bending strength and the shrinkage reach 18.5 MPa and 12.1%, respectively.https://doi.org/10.1515/epoly-2022-0051silicone rubberthermal decompositionshape stabilityceramizationformula design |
| spellingShingle | Wang Xiaotian Qin Yan Zhao Chenglong High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate e-Polymers silicone rubber thermal decomposition shape stability ceramization formula design |
| title | High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate |
| title_full | High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate |
| title_fullStr | High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate |
| title_full_unstemmed | High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate |
| title_short | High-temperature behavior of silicone rubber composite with boron oxide/calcium silicate |
| title_sort | high temperature behavior of silicone rubber composite with boron oxide calcium silicate |
| topic | silicone rubber thermal decomposition shape stability ceramization formula design |
| url | https://doi.org/10.1515/epoly-2022-0051 |
| work_keys_str_mv | AT wangxiaotian hightemperaturebehaviorofsiliconerubbercompositewithboronoxidecalciumsilicate AT qinyan hightemperaturebehaviorofsiliconerubbercompositewithboronoxidecalciumsilicate AT zhaochenglong hightemperaturebehaviorofsiliconerubbercompositewithboronoxidecalciumsilicate |