STUDY ON COPOLYMERIZATION OF D_3~F, D_4

The properties of copolymerization of D F 3, D 4 were studied . It is a balancing copolymerization with opening cycloes. The produce rate of copolymer and high copolymer is almost constant when it is balanced. As for the discovery of alkaline catalyst, strong catalyst is good for producing copolymer of high molecular weight. Owing to the rise of temperature, the copolymerization speeds up, molecular weight of the copolymer decreases down, and it forms a relationship of ln ~1/ T . At the beginning of copolymerizing, to rise the temperature, and then, to reduce it. The purpose of shortening the time of copolymerization and increasing the molecular weight of copolymer can be got.