A study of nonsteady-state kinetics of acrylamide - Y(NO3)3·6H2O complexes spontaneous polymerisation at 20-50°С

D.A. Kritskaya, A.N. Ponomarev

Institute of Energy Problems of Chemical Physics (Branch), Russian Academy of Sciences
142432 Chernogolovka, Moscow Region, Russia

E-mail: dianakrit@gmail.com

Polymer Science, Ser.A, Vol.44, No.2, 2002, pp.105–110.
Translated from
Vysokomolekulyarnye Soedineniya, Ser.A, Vol.44, No.2, 2002, pp.204–210.

Received February 19, 2001; Revised Manuscript Received March 15, 2001

     The kinetics of spontaneous polymerisation of acrylamide complex-bonded with nitrate salt Y(NO3)3·6H2O at 20-50°C have been investigated using the calorimetric and chemical inhibitor methods. It was found that at 28°С the initiation rate was 4·10-10 mol/(l·s) for spontaneous polymerisation in glass cells while it was three orders higher for aluminium cells. It was supposed that the initiation rate increasing in aluminium cell was caused by hydrogen atoms which were generated on metal surface in solution and took part in the initiation.The activation energy of initiation process is 83 kj/mol. It was shown the chain propagation rate constant evaluated by nonsteady-state kinetics method was practically the same as for acrylamide polymerisation in water solution. The model scheme proposed for description of spontaneous polymerisation correlates sufficiently with the experimental data.