A new kind polyfunctional initiator 4

4’ azobis (4 cyanopentanoyl p methyl anilide)(ACPMA) has been synthesized from 4

4' azobis (4 cyano pentanoic acid) via two steps reactions. The thermal decomposition rate of ACPMA in DMF was determined by nitrogen evolution technique at 65

70

75

80℃

respectively. It was found that the decomposition reaction follow first order kinetic and the activation energy was calculated to be 124 6 KJ/mol -1. The prepolymer containing azo end group can be obtained from the polymerization of monomer

such as acrylonitrile(AN)

acrylamide(AAM) using Ce (IV)ion and ACPMA as a redox initiator.The p-methylphenylaminocarbamoyl group would react with Ce(IV)ion to form a nitrogen center radical to initiate monomer polymerization and the azo group is reserved.When the prepolymer obtained was mixed with methyl methacrylate (MMA) in DMF reacted at 65℃

the decomposition of azo group took place and resulting macromolecular carbon center radical would initiate MMA to block copolymerization.The purified block copolymers were characterized by IR analysis.