Benzene → HCID 86741824, compound

Participants

Reaction Conditions

Reaction Steps

A homogeneous mixture of 4 ml of peroxide-free dioxane, 5.124 g of acrylic acid, 1.639 g of 3,4-methylenedioxybenzylacrylate and 69 mg of AIBN is introduced into a vial previously dried in nitrogen atmosphere and bearing a tail-shape end, then the vial is flame-sealed and heated to 60° C. in a thermostat with stirring for 90 minutes. The vial contents are poured into benzene and the solid which is precipitated is filtered, dissolved in a little amount of dioxane and precipitated again in benzene. After further filtering and drying in the oven under vacuum at 30° C. overnight 5.193 g is obtained of the copolymer which is then subjected to fractionation by preparation of a 1% solution by weight of the same in dioxane and adding at a slow rate benzene dropwise to said solution while stirring and keeping the same at a constant temperature of 25° C. Three fractions are collected by filtration corresponding to a small amount of the top fraction, a useful center fraction and a large amount of a tail fraction. The center fraction of 2.86 g has an intrinsic viscosity in dioxane at 25° C. of 82.1 ml/g and an average molecular weight by osmometry of 35,000 dalton.

Provenance & Evidence