ETHYLENE OXIDE EFFECT ON THE POLYMERIZATION OFTERT-BUTYLACRILATE AND SYNTHESIS OF POLYETHER-POLYESTER TYPE BLOCK-COPOLYMERS

Tert-butylacrylate was polymerized by potassium tert-butoxide in THF and toluene in the presence of 10% (by volume) of ethylene oxide. Polymers with good yields and reasonably narrow MWD (Mw/Mn∼2) were obtained. Microtacticity of the polymers is strongly solvent-dependent, the content of isotactic triads being ∼70% in toluene and ∼40% in THF. Upon using ethylene oxide as part of the solvent, diblock-copolymers of polyethylene oxide with poly-tert-butylacrylate with controlled molecular weight characteristics of the polyethylene oxide block were synthesized. The possibility of diethylvinylphosphonate polymerization on the living chain ends of poly-tert-butylacrylate was checked. At the 10% content of ethylene oxide in the reaction medium, diblock-copolymers of poly-tert-butylacrylate and polydiethylvinylphosphonate were obtained and theIR compositions were determined. Triblock-copolymers polyethylene oxide-poly-tert-butylacrylate-polydiethylvinylphosphonate with low polymerization degree of the second and ...