反应详情

温度

75 °C

The crosslinked polymer poly(α-methylene-γ-butyrolactone-acrylic acid-pentaerythritol allyl ether) was prepared by emulsion polymerization of α-methylene-γ-butyrolactone and acrylic acid with the crosslinking monomer pentaerythritol allyl ether. To a four neck round bottom glass flask, equipped with a mechanical stirrer and a thermocouple with a nitrogen inlet at the side of the inlet-tube and two dropping funnels was added the initial charge of 44.03 g of water and 0.51 g of a 20% solution of sodium dodecyl sulfate surfactant. Into the monomer dropping funnel a mixture of 20.8 g of α-methylene-γ-butyrolactone, 1.1 g of acrylic acid and 0.16 g of pentaerythritol allyl ether were added. Into the second dropping funnel the aqueous mixture consisting of 83.43 g water, 1.32 g 20% sodium dodecylsulfate, 0.14 g sodium persulfate and 0.17 g 20% sodium hydroxide solution were added. The initial charge was heated to 75° C. dropwise addition of the monomer was started. Dropwise addition of the aqueous mixture started 5 minutes later. The monomer feed ended 120 minutes after the start of monomer addition, and the aqueous stream ended 5 minutes after the monomer stream ended. After a cook-down time of one hour, the reaction mixture was cooled to room temperature.

1. customTo a four neck round bottom glass flask, equipped with a mechanical stirrer
2. additiona thermocouple with a nitrogen inlet at the side of the inlet-tube and two dropping funnels was added the
3. additionwere added
4. additionwere added
5. additionThe initial charge
6. additiondropwise addition of the monomer
7. additionDropwise addition of the aqueous mixture
8. waitThe monomer feed ended 120 minutes
9. additionafter the start of monomer addition
10. waitthe aqueous stream ended 5 minutes
11. temperatureAfter a cook-down time of one hour, the reaction mixture was cooled to room temperature