Abstract
In this paper, a copolymer has been prepared with bismaleimide resin (BMI) and phenolphthalein cyanate ester resin (PPCE) which formed bismaleimide-triazine (BT) copolymer. PPCE is synthesized in cyanogens halide-phenol method, with the microstructure examined by fourier transmission infrared spectroscopy (FT-IR), 1H-NMR, 13C-NMR, and thermogravimetric analysis (TGA). The BMI/PPCE copolymer exhibits excellent mechanical properties and stable thermal properties when the content of BMI is 30 wt.%. And the moisture absorption of the blends is found to be small higher than PPCE resin. The dielectric properties of BMI/PPCE copolymer, such as dielectric constant and dielectric dissipation factor, show good stability over a wide frequency range from 10 to 60 MHz. In addition, the BMI/PPCE copolymer has a better thermal stability compared with PPCE resin with the increasing of BMI content.
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Acknowledgments
This work was financially supported by the National Science Foundation of China (Innovative Research Group) (No. 51221005), the National Science Foundation of China (No.51407134) and China Postdoctoral Science Foundation (No.2014 M562412). The authors also thank their colleagues in their laboratory for their support.
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Wu, G., Cheng, Y., Xie, Q. et al. Synthesis of a bismaleimide/cyanate ester copolymer containing phenolphthalein functional group with excellent dielectric properties and thermally stable. J Polym Res 21, 615 (2014). https://doi.org/10.1007/s10965-014-0615-0
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DOI: https://doi.org/10.1007/s10965-014-0615-0