New ultraviolet (UV) curable prepolymer, 2–hydroxy–3–[p–(1–{2–hydroxy–3–(isopro– phenylcarbonyloxypropoxy) phenyl} methylcyclohexyl) phenoxy] propyl acrylate (BISCHDA) was synthesized by the reaction of p–[1–(p–hydroxyphenyl) methylcyclohexyl] phenol with methylcyclohexanone, epoxidation with epichlorohydrin followed by addition reaction with acrylic acid. All synthesized compounds were characterized by 1H-NMR, 13C-NMR and FT-IR spectroscopy. Several UV-curable formulated solutions were prepared separately by mixing the prepolymer, BISCHDA (75%), diluent, tri (ethylene glycol) diacrylate (TEGDA) (25%) and different concentrations of a photoinitiator, 2–benzyl–2–dimethylamino–1–(4–morpholinophenyl) butan–1–one (Irgacure369/BDMB) and irradiated
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The contents of the flask were stirred for a period of 15 min, and then the solution was heated to 40 , 0.5 mol p-methylcyclohexanone was introduced drop wise to the solution for about 3 h. Then the mixture was poured into 60 mL boiling water containing 2N potassium hydroxide. The solid product was separated and acidified with dilute sulphuric acid, then washed with distilled water and dried at 45 for 12 h. Recrystallization from benzene and the methanol – water system gave light yellow crystals. The synthesis of the HPMCP is shown in Fig. 1. Yield …show more content…
Then 0.5 mol of HPMCP, 1.1 mol of epichlorohydrin and 250 mL of isopropanol were added to the flask. After thoroughly mixed, then the contents were heated at 45oC for 20 min. Subsequently a solution of 1.25 mol of sodium hydroxide in 500 mL water was added drop wise to the solution and then stirred continuously at The temperature of the system was maintained at 45oC for 5 h. The clear aqueous upper layer was carefully removed and the resin was washed with water. Finally, the product in the flask was washed several times with deionised boiled water to remove the remaining sodium chloride and excess of epichlorohydrin was evaporated and dried under vacuum to give a solid product of OOMPM. It was soluble in aromatic hydrocarbons, chloroform and acetone. The synthesis of OOMPM is shown in Fig. 1. Yield
The contents of the flask were stirred for a period of 15 min, and then the solution was heated to 40 , 0.5 mol p-methylcyclohexanone was introduced drop wise to the solution for about 3 h. Then the mixture was poured into 60 mL boiling water containing 2N potassium hydroxide. The solid product was separated and acidified with dilute sulphuric acid, then washed with distilled water and dried at 45 for 12 h. Recrystallization from benzene and the methanol – water system gave light yellow crystals. The synthesis of the HPMCP is shown in Fig. 1. Yield …show more content…
Then 0.5 mol of HPMCP, 1.1 mol of epichlorohydrin and 250 mL of isopropanol were added to the flask. After thoroughly mixed, then the contents were heated at 45oC for 20 min. Subsequently a solution of 1.25 mol of sodium hydroxide in 500 mL water was added drop wise to the solution and then stirred continuously at The temperature of the system was maintained at 45oC for 5 h. The clear aqueous upper layer was carefully removed and the resin was washed with water. Finally, the product in the flask was washed several times with deionised boiled water to remove the remaining sodium chloride and excess of epichlorohydrin was evaporated and dried under vacuum to give a solid product of OOMPM. It was soluble in aromatic hydrocarbons, chloroform and acetone. The synthesis of OOMPM is shown in Fig. 1. Yield