ANIONIC INITIATING SYSTEM FOR POLYMERISATION AND COPOLYMERISATION OF ACRYLONITRILE AND METHOD OF PRODUCING POLYACRYLONITRILE AND ACRYLONITRILE COPOLYMERS

摘要

FIELD: chemistry.SUBSTANCE: invention relates to an anionic initiating system, as well as to a method of producing fibre-forming polyacrylonitrile and acrylonitrile copolymers using the initiating system. The initiating system contains carbon, hydrogen, nitrogen and oxygen atoms and consists of a lower olefin oxide and a bicyclic tertiary amine or diamine, wherein at least one tertiary nitrogen atom belongs to both rings and is located at the vertex of the bicyclic structure. The method of producing polyacrylonitrile and acrylonitrile copolymers includes polymerising acrylonitrile or copolymerising acrylonitrile with an oxygen-containing monomer under the effect of said initiating system. The process is carried out in polar aprotic solvents.EFFECT: invention enables to control in a wide range molecular weight values and molecular weight distribution parameters of polymers, cut the reaction time from a few hours to a few minutes and obtain polymers which do not contain hard to remove impurities.7 cl, 19 ex