In situ monitoring gelation process of N,N-dimethylacrylamide by refractive index technique

Abstract In situ refractive index technique was used to study the gelation process in the free-radical cross-linking copolymerization (RCC) of N , N -dimethylacrylamide with N , N ′-methylenebisacrylamide as the cross-linker. The change of refractive index was measured and used to monitor the gelation process. The influence of different polymerization conditions on the gelation process, such as monomer, cross-linker and initiator concentrations was investigated and discussed in detail. The kinetic model under steady-state conditions was employed to determine the monomer consumption rate during the gelation process.

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