FIELD: chemical or physical processes.
SUBSTANCE: invention relates to a method of producing a block copolymer of polyethylene terephthalate (PET) with polytetramethylene oxide (PTMO). Method of producing block copolymers is carried out by the fact that at the first step, an esterification reaction of terephthalic acid with ethylene glycol is carried out in the presence of a titanium-containing catalyst, and then copolycondensation of the obtained mixture of diesters of terephthalic acid with polytetramethylene oxide in the presence of phosphoric acid as a stabilizer.
EFFECT: obtained block copolymer has improved physical and mechanical properties, which extend the field of use of this block copolymer.
2 cl, 2 tbl, 5 ex
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