Abstract
An epoxy resin is widely used as the matrix of composite structural materials due to its high mechanical properties, good heat resistance, corrosion resistance, and low cure shrinkage. However, an epoxy resin has poor crack resistance due to its inherent brittleness and is generally used together with a toughening agent. In this study, EPTS (epoxy-terminated phenyl tris(dimethylsiloxy)silane) was firstly synthesized via the hydrosilylation reaction of phenyltri(dimethylsiloxy)silane and allyl glycidyl ether in one step. EPTS was then mixed and cured with E51 epoxy resin to obtain a composite epoxy resin. The tensile test of the composite epoxy resin showed that the elongation at break increased to 11.03% at low temperature and 13.15% at room temperature. Dynamic thermomechanical analysis also fully confirmed the significant improvement in toughness. Finally, the toughening mechanism was revealed by Scanning electron microscope. This material has the advantages of simple synthesis process and low cost and shows a wide prospect.
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Acknowledgements
This project was supported by Guangdong Basic and Applied Basic Research Foundation.
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This work was supported by Guangdong Basic and Applied Basic Research Foundation under the Grant No. 2021A1515010945.
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ZP contributed to the conception of the study; ZZ performed the experiment; ZP, ZZ contributed significantly to analysis and manuscript preparation; ZP, ZZ performed the data analyses and wrote the manuscript; ZZ, YM, YCh, lZ helped perform the analysis with constructive discussions.
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Pan, Z., Zhang, Z., Mo, Y. et al. A novel composite epoxy resin toughened by epoxy-terminated phenyl tris(dimethylsiloxy)silane at low temperature. Polym. Bull. 80, 4023–4034 (2023). https://doi.org/10.1007/s00289-022-04244-9
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DOI: https://doi.org/10.1007/s00289-022-04244-9