HEMAVA Synthesis via LED Radiation

HEMAVA containing 58 mole of vinyl acetate unit was synthesized by free radical polymerization route of HEMA with VAc in two ways by radiation using LED method. A 12.84 g (0.098 mol.) amount of HEMA and 19.82 g (0.230 mol.) of VAc were mixed together while stirring, then 0.055 g of CQ used as photoinitiator was added to the monomer mixture. The reaction mixture was deposed in a Teflon cylindric molder inside the reactor of Scheme 3. A moderate stream of nitrogen gas (3 mL/min) passed through the reactor throughout the polymerization period, as shown in this scheme. The polymerization reaction was carried out by radiation of LED light at 60 °C, and the polymer obtained was easily detached from the mold and was dried in the open air for 12 h then in a vacuum oven at a temperature of 40 °C for 12 h. The material obtained was a thin, transparent and flexible circular pallet.