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Polymerization of methyl methacrylate by a charge transfer mechanism with urea and iron (III) complex

1982; Wiley; Volume: 20; Issue: 11 Linguagem: Inglês

10.1002/pol.1982.170201113

1542-9369

Syed Asim Hussain, N. N. Dass,

Polymer Science and PVC

Abstract Methyl methacrylate (MMA) can be polymerized by a charge transfer complex formed by the interaction of urea, methyl methacrylate, and carbon tetrachloride (CCl 4 ) in a nonaqueous solvent like dimethylsulfoxide (DMSO). The rate of polymerization can be accelerated by Lewis acids like Fe 3+ . This article reports the polymerization of MMA initiated by urea and CCl 4 and accelerated with hexakisdimethylsulfoxide iron (III) perchlorate, [Fe(DMSO) 6 ](ClO 4 ) 3 , and A at 60°C. Definite induction periods were observed for the polymerization reaction initiated by urea and CCl 4 alone, but the induction period completely vanished when the molar ratio of urea to A reached 6:1. The molecular weights of the polymers with 6:1 molar ratio of urea to A were higher than with urea alone. The rate constant for the polymerization of MMA in the presence of [Fe(urea) 6 ] 3+ was 1.03 × 10 −5 1 mol −1 s −1 at 60°C. The transfer constant for CCl 4 for polymerization with urea alone is 2.43 × 10 −3 at 60°C.