Mechanically improved sol-gel derived methacrylate-siloxane hybrid materials with urethane linkage was written by Kim, Yun Hyeok;Choi, Gwang-Mun;Kim, Yong Ho;Bae, Byeong-Soo. And the article was included in Journal of Sol-Gel Science and Technology in 2019.Formula: C16H26O7 This article mentions the following:
UV-curable and highly condensed (>86%) methacrylate Ph oligo-siloxane (MPO) was synthesized by non-hydrolytic sol-gel condensation reaction between methacrylate and Ph silane precursor. The MPO resin was then cured by an UV-initiated free-radical polymerization to fabricate a transparent (>90% at 550 nm) methacrylate-siloxane hybrid material (methacrylate hybrimer). An urethane butanediol dimethacrylate (UBDM) monomer was synthesized as a cross-linker into the methacrylate hybrimer networks without micro-phase separation The UBDM increased methacrylate conversion and mech. properties due to the hydrogen bonding of the urethane linkage. The hardness, modulus, and strength were improved by UBDM insertion, the flexibility was even increased with 140% elongation, compared to neat MH. In addition, a storage modulus related to the thermo-mech. properties was also enhanced by a denser cross-linkage with the urethane linkage. In the experiment, the researchers used many compounds, for example, ((Oxybis(ethane-2,1-diyl))bis(oxy))bis(ethane-2,1-diyl) bis(2-methylacrylate) (cas: 109-17-1Formula: C16H26O7).
((Oxybis(ethane-2,1-diyl))bis(oxy))bis(ethane-2,1-diyl) bis(2-methylacrylate) (cas: 109-17-1) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.Formula: C16H26O7
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts