The present paper reports the synthesis and free-radical polymerization of N-(2-acryloyloxyethyl )phthalimide (A) and its copolymerization with methyl methacrylate (M). This acrylic monomer was prepared in fairly good yield according to a synthetic scheme that includes two steps. The purified acrylic derivative was polymerized in dimethylformamide solution at 60°C, using azobisisobutyronitrile as free-radical initiator. The kinetic behaviour indicates that this monomer presents a rather high polymerization rate, with a value of kp/klt/2 = 1.36 11/2 mol-1/2 s-1/2. Copolymerization reactions were carried out in the same experimental conditions and the reactivity ratios were determined by the application of the Kelen-TfidiSs and non-linear least-squares methods. The values of reactivity ratios calculated by the linearization method were r k = 0.29 _+ 0.02 and r M -- 3.02 _+ 0.32, whereas the application of the non-linear least-squares method gave values oft A = 0.30 and r M -- 3.07. From these values the corresponding Q and e parameters were calculated, giving values of Q = 0.27 and e = 0.71.
Посилання на статтю:
Synthesis, polymerization and copolymerization of N-( 2-acryloyloxyet hyl ) phthal i mide / Javier de Abajo, Enrique L. Madruga, Julio San Rom6n,Jos6 G. de la Campa and Julio Guzman // Polymer. – 1992. – Vol 33. – P. 1090-1095.