Polymerization of Acrylamide with Ceric Ion-Alanin Redox System:A Kinetic Study

摘要

The polymerization of acrylamide (AM) in aqueous sulphuric acid medium initiated with cerie ammonium sulphate-alanine redox system was investigated in the temperature range 30-50degC.The rate of polymerization (R_p) and the rate of cerium(IV) disappearance were measured.The influence of varying [acrylamide],[alanine] and [Ce(IV)] and the effects of orgnic solvents on the rate of polymerization were examined.The temperature dependence of the rate was studied and the activation parameters were calculated using Arrhenius and Erying plots.The initiation was caused by the free radical generated by the decomposition of the complex formed between Ce(IV) and alanine (AL).The chain termination step of polymerization reaction occurred by the mutual interaction of free radicals.