Improving ablation resistant properties of epoxy-silicone rubber composites via boron catalyzed graphitization and ceramization

In this paper, ablation resistant epoxy-silicone rubber composites were prepared and the influences of B on the charring and ceramization process were systemically studied. After incorporating B particles, significant improvement in heat resistance and ablation resistance of composite materials was...

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Bibliographic Details
Published in:Journal of polymer research 2022-08, Vol.29 (8), Article 359
Main Authors: Chen, Fei, Chen, Ziyang, Chen, Yang, Liang, Mei, Heng, Zhengguang, Zou, Huawei
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Composite materials
Crystal defects
Epoxy resins
Graphitization
Industrial Chemistry/Chemical Engineering
Original Paper
Polymer Sciences
Rubber
Silicone resins
Silicone rubber
Silicones
Thermal conductivity
Thermal decomposition
Thermal resistance
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Summary:In this paper, ablation resistant epoxy-silicone rubber composites were prepared and the influences of B on the charring and ceramization process were systemically studied. After incorporating B particles, significant improvement in heat resistance and ablation resistance of composite materials was obtained, benefitting from the pore structure, strength, composition and thermal conductivity of ablation layers. When the addition of B was 2.5wt%, the maximum thermal decomposition temperature increased by 12.31%, and the linear ablation rate and mass ablation rate were reduced by 34.86% and 36.11%, respectively, compared with the control rubber composites. The catalytic mechanism indicates that the introduction of B can not only lower the SiC generation temperature to promote ceramization but also compensate for the carbon lattice defects to promote graphitization. It was expected that our work could provide some new ideas and a theoretical basis for designing and preparing ablation resistant silicone-based composites.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-022-03209-w