A Bio‐Based Allylphenol (Eugenol)‐Functionalized Fluorinated Maleimide with Low Dielectric Constant and Low Water Uptake

Abstract

AbstractA bio‐based allylphenol (eugenol)‐functionalized fluoro‐containing maleimide derived from easily available cyanuric chloride is synthesized, and it is thermally transformed to a cross‐linked polymer. It is found that the polymer displays a 5% weight loss temperature of up to 413 °C, a glass transition temperature (T g) of up to 274 °C, and a thermal expansion coefficient (CTE) of 66.21 ppm °C−1 varying from 50 to 300 °C. The polymer is also found to exhibit lower water uptake (1.06%) than commercial 4,4′‐bismaleimidodiphenylmethane (BMI) resins (3%) and allyl‐modified bismaleimides (4.5%). This polymer is also found to indicate good dielectric properties with a dielectric constant (D k) of below 2.9 and a dissipation factor (D f) of less than 7 × 10−3 for frequencies varying from 40 Hz to 25 MHz. It is reported that, compared to the commercial BMI with CTE of 77.85 ppm °C−1 and D k of 3.50, this eugenol‐functionalized fluoro‐containing maleimide possesses good properties, suggesting that this new maleimide has potential application in the microelectronic industry.