Azobisisobutyronitrile → 2-Hydroxyethyl 5-norbornene-2-carboxylate t-butyl 5-norbornene-2-carboxylate 5-norbornene 2-carboxylic acid maleic anhydride

Participants

Reaction Steps

1 mole of maleic anhydride, 0.05-0.8 moles of 2-hydroxyethyl 5-norbornene-2-carboxylate, 0.5-0.95 moles of t-butyl 5-norbornene-2-carboxylate and 0.01 to 0.2 moles of 5-norbornene 2-carboxylic acid (structures of which are shown in formula IX below) were dissolved in tetrahydrofuran or toluene. Thereafter, it was dissolved in a solvent. A radical reaction was executed at a temperature of about 60-70° C. for 4-24 hours under a nitrogen or argon atmosphere in the presence of 0.5-10 g of azobisisobutyronitrile (AIBN), as an initiator. The resin thus produced by this polymerization was precipitated in ethyl ether or hexane and dried to yield poly[2-hydroxyethyl 5-norbornene-2-carboxylate/t-butyl 5-norbornene-2-carboxylate/5-norbornene 2-carboxylic acid/maleic anhydride] resin of the following formula X. ##STR6##

Provenance & Evidence