NEW THERMO-CROSS-LINKING REACTIONS OF POLYMERS CONTAINING PENDANT EPOXIDE GROUPS WITH VARIOUS POLYFUNCTIONAL ACTIVE ESTERS

New thermo-crossllinking reactions of poly(glycidyl methacrylate), copolymers of glycidyl methacrylate with methyl methacrylate, styrene or ethyl acrylate with various active esters such as di left bracket S-(2-benzothiazolyl) right bracket thioadipate (BTAD), di(S-phenyl) thioadipate (PTAD), di(4-nitrophenyl) adipate (NPAD), diphenyl adipate (PAD), and di(S-phenyl) thioisophthalate (PTIP), and other polyfunctional esters were carried out in the film state using various catalysts such as quaternary ammonium or phosphonium salts, tert-amines, or the crown ether 18-crown-6 equals potassium salts system. It was found that the rate of reaction was affected strongly by reaction temperature, catalyst concentration, length of alkyl chain in the catalyst, kind of counterion of quaternary ammonium salts as a catalyst, content of pendant epoxide groups in the polymer, and kind of copolymer unit in the polymer, respectively.