writer：Junwei Gu, Wencai Dong, Yusheng Tang, Yongqiang Guo, Lin Tang, Jie Kong*, Sruthi Tadakamalla, Bin Wang and Zhanhu Guo*
keywords：2-((3-trifluoromethyl) phenoxy)methyl)oxirane (TFMPMO) ; bisphenol A dicyanate ester (BADCy); dielectric properties; thermal & dimension stability
source：期刊
specific source：Journal of Materials Chemistry C
Issue time：2017年

In this contribution, we presented a new strategy for the fabrication of modified cyanate ester resins combined with ultra-low dielectric properties, prominent mechanical properties and excellent thermal & dimension stabilities. Fluoride-containing compound of 2-((3-trifluoromethyl)phenoxy)methyl oxirane (TFMPMO), synthesized from m-(trifluoromethyl)phenol (TFMP) and epichlorohydrin (ECH), was used to modify bisphenol A dicyanate ester (BADCy) resins via copolymerization reaction. The BADCy resin modified with 15 wt% TFMPMO presented ultra-low dielectric constant (ε, 2.75) and dielectric loss tangent value (tanδ, 6.7×10-3), high mechanical properties (impact strength of 15.4 kJ/m2 and flexural strength of 141.0 MPa), and superior thermal & dimension stability (THeat-resistance index of 206 oC and coefficient of thermal expansion of 6.4×10-5), which possessed great potential application in radomes and antenna system of aircrafts.