Azobisisobutyronitrile-initiated graft copolymerization

Benzoyl Peroxide and Azobisisobutyronitrile-Initiated Graft Copolymerization. Cellulose nitrate (CN) (10 g) was dissolved in methyl isobutyl ketone (90 ml) in a three-necked flask and to this solution methyl methacrylate (10 ml) and benzoyl... 

The hydrogen abstraction from —SH groups is faster than from —OH groups. Hebeish et al. [9] and Misra et al. [10,11] reported the chain-transfer method of initiation of graft copolymerization onto cellulosic substrates with azobisisobutyronitrile (AIBN) and benzoyl peroxide (BPO) as initiators. 

Figure 10. Effect of initiator concentration on the graft copolymerization of methyl methacrylate onto cellulose nitrate initiated by a, benzoyl peroxide and b, azobisisobutyronitrile. Key O, grafting efficiency 9, percent grafting.

Azobisisobutyronitrile is used as a catalyst in vinyl polymerization and as a blowing agent for making foam rubber [114]. Azobisisobutyronitrile also is used as a free radical initiator (FRI) in graft copolymerization. 

Graft copolymerization was carried out at 60°C in evacuated sealed ampoules using styrene as a monomer, azobisisobutyronitrile (AIBN) as an initiator and dimethylformamide(DMF) as a solvent. 

Polyvinylpyrrolidone (PVNP) Grafting. PVNP was grafted onto Biomer by radiation copolymerization of N -vinylpyrollidone monomer (Polysciences, Inc.) onto the elastomer surface. Polymerization was ultraviolet radiation-initiated in a monomer solution containing 0.1% azobisisobutyronitrile (AIBN) (Polysciences, Inc.). 

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