Two photosensitive chalcone-based benzoxazine monomers and their high-performance polymers from renewable sources was written by Feng, Zijian;Zeng, Ming;Tan, Dengru;Lu, Xiang;Shen, Yufang;Xu, Qingyu;Meng, Dawei. And the article was included in Journal of Materials Science in 2022.COA of Formula: C13H12O2 The following contents are mentioned in the article:
Two novel photosensitive bio-based benzoxazines are firstly synthesized from chalcone derivates and furfurylamine. The thermal and photo-thermal curing methods are applied to polymerize benzoxazine monomers. Both thermal and photo-thermal cured benzoxazine resins exhibit high glass transition temperatures and good thermal stability properties, resulting from the curing of double bond of chalcone moiety and substitution reaction of furan ring for the thermal cured resins, and photo-dimerization of chalcone structure and grafting reaction of furan ring for the photo-thermal cured samples. It is especially noteworthy that the photo-thermal curing method is good for the formation of cyclobutane ring upon irradiation, resulting in the improvement of crosslinking d. and the reduction in the mol. polarity. Hence, the photo-thermal cured resins present higher glass transition temperatures and lower superhigh-frequency dielec. constants than those of the corresponding thermal cured samples. Therefore, this work not only provides an effective strategy for the design and preparation of high-heat-resistance bio-based benzoxzine resins with superhigh-frequency low dielec. constants, but also provides insight into the effects of photosensitive chalcone moiety and reactive furan ring as well as curing methods on the curing behavior, and thermal and superhigh-frequency dielec. properties of bio-based benzoxazine resins. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8COA of Formula: C13H12O2).
4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. A multistep synthesis may use Grignard-like reactions to form an alcohol with the desired carbon structure, followed by reactions to convert the hydroxyl group of the alcohol to the desired functionality.COA of Formula: C13H12O2
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts