反应详情

温度

90 °C

In an autoclave equipped with a 1.5-liter glass polymerization vessel and purged with nitrogen, polymerization reaction was carried out by dissolving 225.0 grams (1.28 mol) of p-butoxystyrene and 25.0 grams (0.20 mol) of t-butyl acrylate in 500 grams of acetone, adding 7.5 grams of t-butylperoxy(2-ethylhexanoate) as a polymerization catalyst, and heating the mixture at 90° C. Thereafter, the catalyst was added in incremental amounts, that is, 5.0 grams after 21/2 hours and 2.5 grams after 41/2 hours from the start of polymerization reaction. After 6 hours of polymerization, the reaction solution was cooled down and the acetone was distilled off. A 9/1 methanol/water mixture was added to the reaction solution, causing the copolymer to crystallize. The copolymer had a weight average molecular weight (Mw) of 9,200, a dispersity (Mw/Mn) of 1.64, and a copolymerization ratio of 6:1. The yield was 70.0%.

1. custompurged with nitrogen, polymerization reaction
2. additionThereafter, the catalyst was added in incremental amounts
3. custom5.0 grams after 21/2 hours and 2.5 grams after 41/2 hours from the start of polymerization reaction
4. customAfter 6 hours of polymerization
5. temperaturethe reaction solution was cooled down
6. distillationthe acetone was distilled off
7. additionA 9/1 methanol/water mixture was added to the reaction solution
8. customto crystallize