Ethylene Glycol → Dimethyl terephthalate

Participants

Reaction Steps

93.1 g(0.48 mol) of dimethyl terephthalate, 10.68 g(0.02 mol) of dimethyl 6,6'-(isophthaloyl-dioxy)-di-2,2'-naphthoate, 68.2 g(1.1 mol) of ethylene glycol were polymerized in the presence of 87 mg of magnesium acetate tetrahydrate and 34 mg of cobalt acetate tetrahydrate. At the temperature of 250° C., 45 mg of antimony trioxide and 300 mg of 3,5-di-tert.-butyl-4-hydroxy anisole were added. The resulting polymer had an intrinsic viscosity of 0.55 dl/g, a Tg of 81° C. and a Tm of 232° C.

Provenance & Evidence