Tetrafluorophenylene-Containing Vinylbenzyl Ether-Terminated Oligo(2,6-dimethyl-1,4-phenylene ether) with Better Thermal, Dielectric, and Flame-Retardant Properties for Application in High-Frequency Communication was written by Chen, Yi-Chun;Reddy, Kamani Sudhir K.;Lin, Yu-An;Wang, Meng-Wei;Lin, Ching-Hsuan. And the article was included in ACS Omega in 2022.Safety of 4-Benzyloxyphenol The following contents are mentioned in the article:
In an integrated circuit, signal propagation loss is proportional to the frequency, dissipation factor (Df), and square root of dielec. constant (Dk). The loss becomes obvious as we move to high-frequency communication. Therefore, a polymer having low Dk and Df is critical for copper-clad laminates at higher frequencies. For this purpose, a 4-vinylbenzyl ether phenoxy-2,3,5,6-tetrafluorophenylene-terminated OPE (VT-OPE) resin was synthesized and its properties were compared with the thermoset of com. OPE-2St resin. The thermoset of VT-OPE shows a higher Tg (242 vs. 229°C), a relatively high crosslinking d. (1.59 vs. 1.41 mmole cm-3), a lower coefficient of thermal expansion (55 vs. 76 ppm/°C), better dielec. characteristic at 10 GHz (Dk values of 2.58 vs. 2.75, Df values of 0.005 vs. 0.006), lower water absorption (0.135 vs. 0.312 weight %), and better flame retardancy (UL-94 VTM-0 vs. VTM-1 with dropping seriously) than the thermoset of OPE-2St. To verify the practicability of VT-OPE for copper-clad laminate, a laboratory process was also performed to prepare a copper-clad laminate, which shows a high peeling strength with copper foil (5.5 lb/in), high thermal reliability with a solder dipping test at 288°C (>600 s), and the time for delamination of the laminate in thermal mech. anal. (TMA) at 288°C is over 60 min. This study involved multiple reactions and reactants, such as 4-Benzyloxyphenol (cas: 103-16-2Safety of 4-Benzyloxyphenol).
4-Benzyloxyphenol (cas: 103-16-2) belongs to ethers. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Safety of 4-Benzyloxyphenol
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem