Abstract
A novel epoxy and fluorine-containing linear random copolymer of P(PFS-co-GMA) is synthesized from pentafluorostyrene (PFS) and glycidyl methacrylate (GMA) via RAFT polymerization, which is then performed to prepare modified bisphenol A dicyanate ester (m-BADCy) resin. Small dipole and low polarizability of C–F bond in PFS improve the wave-transparent performance of m-BADCy resin. Besides, the large free volume of P(PFS-co-GMA) and formation of semi-IPN structure simultaneously enhances the mechanical properties. The obtained m-BADCy resin with 15 wt% P(PFS-co-GMA) demonstrated the optimal comprehensive properties. ε and tanδ were 2.59 and 0.0053, respectively, lower than that of pure BADCy resin (2.97 and 0.0090). The corresponding wave transmittance (|T|2) increased from 92.9% of pure BADCy resin to 94.5%. Meanwhile, the corresponding flexural and impact strength increased to 122.4 MPa and 14.6 kJ/m2, increased by 23.1% and 49.0% compared with pure BADCy resin (99.4 MPa and 9.8 kJ/m2), respectively.
Graphical abstract
A novel epoxy and fluorine containing linear random copolymer of P(PFS-co-GMA) was synthesized from pentafluorostyrene (PFS) and glycidyl methacrylate (GMA) via RAFT polymerization, which was then performed to prepare modified bisphenol A dicyanate ester (m-BADCy) resin. The m-BADCy resin displayed significantly improved wave-transparent performance and mechanical properties, while maintaining excellent thermal properties.
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Funding
This research was financially supported by the National Scientific Research Project (Basis Strengthening Plan) and China Postdoctoral Science Foundation (2019M653735). C. Q. and L. L. acknowledge the Undergraduate Innovation & Business Program in Northwestern Polytechnical University for funding (S202110699153 and S202110699571). This work is also financially supported by Polymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars.
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Zhou, Y., Zhang, J., Qu, C. et al. Synchronously improved wave-transparent performance and mechanical properties of cyanate ester resins via introducing fluorine-containing linear random copolymer. Adv Compos Hybrid Mater 4, 1166–1175 (2021). https://doi.org/10.1007/s42114-021-00349-3
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DOI: https://doi.org/10.1007/s42114-021-00349-3