The products of N-chloro derivatives (N-Cl-PAM) of polyacrylamide (PAM) with water and 1-propanol at pH 7.5 were characterized by X-ray photoelectron spectroscopy (XPS)．The N-C-PAM reacted with water to form the polymers with alkyl acyl urea structures．N-Cl-CB groups (91.8％) of N-Cl-PAM were converted to —CONHCONH— (78.0％) and—NHCOO— (13.8％) during the reactions of N-Cl-PAM with 1-propanol aqueous．These results illustrate that under neutral papermaking conditions NCl-PAMs can react by themselves to form net work structures or N-Cl-CB groups of N-Cl-PAM react with hydroxyl groups of cellulose and hemicellulose to form covalent bonds．The formation of the structures results in great improvement of dry and wet-strengths.