Photoinduced graft copolymerization of acrylamide onto styrene—butadiene—acrylonitrile copolymer

✍ Scribed by E.A. Abdel-Razik

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 320 KB
• Volume: 69
• Category: Article
• ISSN: 1010-6030
• DOI: 10.1016/1010-6030(92)85268-y

✦ Synopsis

The photoinduced graft copolyrnerization of acrylamide (AM) onto styrene-butadiene-acrylonitrile (AM) copolymer in chloroform and in the presence of benzophenone was investigated. UV irradiation was used in the range 310-460 nm. The grafting parameters, such as weight conversion, grafting percentage and grafting efficiency,

were determined as a function of the irradiation time and the concentrations of monomer, substrate and initiator.

The combinations of benzophenone with some amines, such as n-butylamine, trimethylamine and triethylamine, were examined as photoinitiating systems. The IR spectrum of the ABS-g-AM graft copolymer shows the disappearance of the double bond at 1630 cm-' and the appearance of a new peak at 1685 cm-' which indicates the presence of polyacrylamide chains in the ABS backbone. The rate of copolymerization of AM onto ABS was determined (R,=O.85% min-I). The mechanism of formation of grafted chains in the presence of different photoinitiating systems is discussed.