Copolymerization of ethylene chlorophosphonite with 2‐phenyl‐1,3‐dioxolane and its flame‐retardant effect on polyester fabric

摘要

AbstractCopolymerization of ethylene chlorophosphonite (ECP) with 2‐phenyl‐1,3‐dioxolane (PhD) and the flame‐retardant effect of the copolymer on polyester fabric were investigated. (1) Copolymerization occurred without added catalyzer. The number‐average molecular weight ranged from 600 to 1000.1H‐nmr and ir spectra for the copolymers showed that their structures varied depending on feed composition (ECP/PhD ratio): ECP/PhD less than or equal to 1 yielded an alternating copolymer having the structureand at ECP/PhD ratios greater than 1, some insertion reaction of ECP into polymer I occurred. (2) Selectivity of flame retardation could be observed. The copolymer with structure I was an effective flame retardant for polyester fabric but useless for cotton fabric. Its effectiveness in polyester fabricwas superior to t