Resveratrol-Based Fluorinated Materials with High Thermostability and Good Dielectric Properties at High Frequency

Two resveratrol-based monomers with thermo-cross-linkable trifluorovinyl-ether groups (−OCF═CF 2 ) have been designed and synthesized. After treating at a temperature above 140 °C, the monomers were converted into cross-linked networks, which display the average dielectric constants ( D k ) of 2.45–2.52 and the average dielectric loss ( D f ) of 2.2 × 10 –3 to 2.6 × 10 –3 at a high frequency of 5 GHz. Such data are much better than these of the resveratrol-based epoxy resin ( D k of above 3.5 and D f of near 2.6 × 10 –2 ) and the commercial bisphenol A epoxy resins ( D k of above 3.7). In addition, two cured monomers exhibit high thermostability with a 5% weight loss temperature ( T 5d ) of more than 450 °C. They also display low water uptake of below 0.08% when immersed in boiling water for 3 days. These data indicate that the resveratrol-based monomers in this contribution are suitable as the encapsulation resins for the application in the microelectronic industry.