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Study on the microstructure evolution of phenol-formaldehyde resin modified by ceramic additive |
| JIANG Haiyun1, WANG Jigang2, DUAN Zhichao2, LI Fan2 |
| 1.School of Materials Science and Engineering, Southeast University, Nanjing 211189, China; Department of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, China; 2.School of Materials Science and Engineering, Southeast University, Nanjing 211189, China |
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Abstract Boron carbide (B4C) was selected as the additive for the modification of a phenol-formaldehyde (PF) resin, and the micro-structural evolution of the modified resin at high temperature was investigated. Results showed that the distribution of B4C particles became uniform at elevated temperatures. The primary oxidation of B4C started to occur at 450vH, and lots of B2O3 was formed above 650vH. By the modification reactions of B4C, the volatiles including CO was converted into amorphous carbon and remained in the resin matrix, which was responsible for maintaining the stability of the resin at high temperatures.
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Issue Date: 05 March 2007
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