Water → alpha-Methylene-gamma-Valerolactone Acrylic Acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a 50 mL round bottom flask equipped with a magnetic stir bar was added 7.3769 g (0.343 mol) water and 0.084 g (2.70×10−4 mol) sodium dodecyl sulfate. (20% aqueous solution). The mixture was heated under flowing nitrogen to 73° C., at which point a monomer mixture consisting of 3.4691 g (2.58×10−2 mol) α-methylene-γ-valerolactone and 0.184 g (2.56×10−3 mol) acrylic acid was added via syringe pump over 115 minutes. After 10 minutes of monomer mixture addition, an aqueous mixture consisting of 13.9194 g (0.649 mol) water, 0.2360 g (6.87×10−4 mol) sodium dodecyl sulfate (20% aqueous solution), 0.0201 g (1.68×10−5 mol) sodium persulfate, and 0.0376 g of a 20% aqueous sodium hydroxide solution was also added via syringe pump over 120 minutes. After both the monomer and aqueous mixtures were added completely, the emulsion was allowed to stir for an additional 60 minutes, after which the reaction was cooled to room temperature and dried under vacuum at 100° C. Analysis of the polymer by DSC showed a single Tg at 210° C. Size exclusion chromatography yielded a molecular weight of 931 kDa and a PDI of 2.00.

Herkunft & Nachweise