Abstract
Novel elastomers filled with different contents of silica through a two-step one-pot thiol-ene reaction were reported. Two monomers of poly (ethylene glycol) dimethacrylate and 1,6-hexanedithiol were used in the first step to synthesize a vinyl-terminated prepolymer at room temperature. In the second step, silica and chemical cross-linker trimethylolpropane tris(3-mercaptopropionate) were directly added to the prepolymer in sequence and transparent elastomers were obtained in 30 min at room temperature. The cross-linking kinetics and mechanical properties in the presence of different contents of silica were investigated in detail by rheological, tensile and cyclic loading measurements. It was found that silica had a significant reinforcing effect on the mechanical properties of the elastomers. Our synthetic method is simple, solvent-free and energy- and cost-efficient. Our findings pave a new way to fabricate novel sulfur-containing elastomers using thiol-ene chemistry.
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Acknowledgements
G.W. is grateful for the financial support of Zhejiang Provincial Natural Science Foundation of China (grant No. LY19E030002), Natural Science Foundation of Ningbo (grant No. 2019A610133) and K. C. Wong Magna Fund in Ningbo University.
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Kuang, H., Yin, Q., Zhang, R. et al. Using facile one-pot thiol-ene reaction to prepare elastomers filled with silica. J Polym Res 27, 317 (2020). https://doi.org/10.1007/s10965-020-02298-9
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DOI: https://doi.org/10.1007/s10965-020-02298-9