The Hofmann reactions of five polyacrylamides(PAM) with different molecular weights of two different concentrations were carried out to get better understanding the mechanisms of the reaction. The results show that the maximum conversion of N chloroamides increased with molecular weights of PAM and got to the highest value at 9×10 4 , then decreased. The changes in maximum conversion of amino groups are similar to those of N chloroamides, the maximum content of amino group of PAM studied was 97%. However , the time to reach maximum conversion of amino groups appeared to be independent of the molecular weights in the range investigated.
