Methylation Of Caprolactam And Adsorption Properties Of Macroporous Crosslinked Poly (N-methylacrylamide)

Methylation of amide compounds has applications in the synthesis of medicine and pesticide. The application of alkyl modified polyacryamide has attracted scientists' attentions. In this dissertation, synthesis of N-methylcaprolactam has been explored by applying the methylation of amide with a new method. In addition, macropous crosslinked polyacrylamide resin was chemically modified by using the N-methylation of amide, and the mechanical strength, swelling properties in aqueous solution, and adsorption properties for polyphenols of the modified resin have changed a lot。1-Aza-2-methoxy-1-cyccloheptene and N-methylcaprolatam were synthesized on solvent-free condition. In contrast with the methods applied previously, this new method is simple operated, low cost, and slight polluted.Macroporous crosslinked polyacrylamide resin was prepared from N, N-' methylenebisacrylamide and acrylamide via inverse phase suspension polymeri- zation, and it was used as the mother resin. Macroporous crosslinked poly(N-methylacrylamide) resin was synthesized with N-methylation by applying the mother resin. The swelling properties in aqueous solution, adsorption properties of the mother resin and the modified resin for tannin and tea polyphenols in aqueous solution were determined. The results indicated that the modified resin is less hydrophilic, while its adsorption capacity for polyphenols such as tannin and tea polyphenols in aqueous solution is larger than the mother resin. Adsorption mechanism between the adsorbent and the adsorbate, and adsorption thermodynamics of polyphenols in aqueous solution onto the modified resin were investigated.