Benzoyl Peroxide → Prop-2-enenitrile--ethenylbenzene (1/1)

Participants

Reaction Conditions

Reaction Steps

A styrene-acrylonitrile copolymer was prepared by suspension polymerization using a one gallon agitated, jacketed reactor. In the preparation of sample 42 the following reactor charge was employed: 780 grams of styrene, 280.8 grams of trichlorotrifluoroethane, commercially available under the trade designation Freon 113, 2.89 grams of benzoyl peroxide, 2.29 grams of tertiary butyl perbenzoate and 195 grams of acrylonitrile. The reactor was closed and agitated for 15 minutes at 250 revolutions per minute. Agitation was stopped and the following materials added: 1250 grams of water, 4.1 grams of carboxy methyl cellulose, 0.55 grams of sodium dichromate and 80 mg of sodium nitrate. The contents of the vessel were heated to 82° C. for 8.3 hours, subsequently heated to 120° C. for a period of 2 hours and the contents cooled and the polymer recovered. The reactor was agitated at 105 revolutions per minute for the first 3 hours and subsequently at 180 revolutions per minute. Sample 43 was prepared employing similar proportions to that of sample 42 but 0.04 weight percent of 72 weight percent active divinyl benzene was added to the monomer mixture.

Provenance & Evidence