Thermal and water absorption properties of cyanate ester resins modified by fluoride‐containing and silicone‐containing components

Abstract

resin matrix, hence reducing the water absorption of the materials. [22][23][24][25][26][27][28][29] More importantly, silicon-containing resins exhibited excellent heat resistance, weather resistance, and electrical insulation, 1,8,[30][31][32][33][34][35][36] while fluorine-containing resins also have advantages in heat resistance, dielectric properties, chemical stability, weather resistance, and nonflammability. These features were made silicon-containing and fluorine-containing resins suitable components for the modification of high temperature dielectric thermosets, and some successful examples were already realized in CE resins. Yang et al reported the preparation of epoxidized polysiloxane (E-Si), and the addition of E-Si into CE resin cannot only significantly decrease the curing temperature of the CE resin but also improve its water resistance and toughness. 22 Dai et al reported an epoxidized polysiloxane with amino silicone and used it as a modifier to effectively reduce the dielectric constant of CE resin. 28 Guenthner et al reported the preparation of a novel silyl cyanate monomer from bis (4-cyanophenyl) dimethylsilane (Simcy), and moisture absorption of the as-prepared CE resin was reduced by 50%, when compared with pure CE resin. 37 Gu's group synthesized high-quality and stable fluoride-containing compound 2-((3-(trifluoromethyl)phenoxy)methyl) oxirane (TFMPMO), and the results showed that TFMPMO was gifted with lower moisture absorption than cyanate ester resins. 25 Chao Yuan et al prepared a novel fluoropolymer, which could help reduce the moisture absorption of pure CE resin. 8 Guo et al 26 prepared a novel fluorinated allyl compound (6FDABPA) and used it to reduce water absorption of CE resins. As mentioned above, fluorine-and silicon-containing resins have demonstrated positive effect on the hygroscopicity of CE resins. However, comprehensive evaluation should be considered during the modification of CE resins, where the suppression of water absorption should not berealized at big costs of thermal and mechanical properties. 8,32,33 Herein in this paper, a series of novel silicone-containing and fluorine-containing components were prepared and introduced into CE resins, and the water absorption, thermal, mechanical, and dielectric properties were systematically characterized. The structure-property relationship was proposed and discussed.

Rice Husk Ash/Silicone Rubber-Based Binary Blended Geopolymer Coating Composite: Fire Retardant, Moisture Absorption, Optimize Composition, and Microstructural Analysis

“…The SiR/CaSiO 3 was the most significant in improving water resistance properties [ 27 ]. Pei et al [ 28 ] studied the water absorption properties of cyanate ester resins modified by fluoride-containing and silicone-containing components. Results revealed that the moisture absorption value of the cyanate ester resins incorporated with silicone resin exhibited only 0.39% moisture uptake after 45 days, which was remarkably lower than that of neat cyanate ester resins with 0.98%.…”

Design and synthesis of isosorbide‐based copolycarbonates with high transparency and low hygroscopicity for optical applications

“…Therefore, reducing the water absorption of materials has attracted interest 19,20 . Pei et al added a methyl phenyl silicone resin to the cyanate resin (CE) and reduced the water absorption of the cured polymer by 60% compared to the original CE 21 . Chun et al added 30% polypropylene (PP) to polyamide‐6 (PA6) composites, which reduced water absorption by 23% compared with pure PA6 giving a water absorption of 5.48% 22 .…”

Cyanate ester resins with superior dielectric, mechanical, and flame retardance properties obtained by introducing a fluorinated hyperbranched polyaryletherketone

“…Introducing functional groups or chemical bonds with low polarity, such as C-Si [32][33][34] and C-F, [35][36][37] can effectively reduce the ε value of the polymer. Yin et al 36 prepared a flexible and transparent composite film of t-FG/f-PI by a spin-coating method using two-dimensional fluorine-containing graphite (FG) and fluorine-containing polyimide (f-PI).…”