Abstract
Polyacrylamide was reacted with hydrazine hydrate to give polyacrylic hydrazide. Analysis of polyacrylic hydrazide was investigated, and a method of quantitative analysis was established by using iodometry.
Using the analytical method, the reaction of the synthesis of polyacrylic hydrazide in various conditions was discussed. In the reaction of polyacrylamide with tenfold amount of hydrazine hyderate at the temperature of 5055°C, the degree of hydrazidation was found to attain the highest value of about 85% in the reaction time of six hours, and the similar value of the reaction degree was obtained in about two hours at 7075°C. At higher temperature than these, however, the degree was rather found to drop by some side reactions.
Polyacrylic hydrazide is soluble in water and serves as a cationic polyelectrolyte. The solution viscosity of polyacrylic hydrazide was found to increase with the degree of hydrazidation.
It was found in paper making that polyacrylic hydrazide hydrochloride is effective to retaining of size and filler on pulp fibers and to increase the strength of paper.
