O H H H,C-C--C-NH, +CH,C--C-NH CH Acrylamide Methylenebisacrylamide S, 0(persulfate) 2 SO4.(sulfate free radical) CONH CONH TEMED CH2—CH—CH,CH一CH2CH (N,N, N, N-tetramethylenediamine) CONH CH CONH CH2CH—CH2CH—CH2-CH CONH CONH 7TEMED (N,N,N,N-tetramethylenediamine) 7