抄録
Mechanical degradation in polyacrylamide (PAA)/water mixtures have been studied by using a homomixer at room temperature. The degree of degradation was determined by measuring the number-average chain length at various stages of mechanical degradation. It was found that the rate constant of mechanical degradation (kS) decreases with the degree of polymerization of PAA at the initial stage of the degradation. From the effect of pH on the degradation of PAA, the maximum rate was obtained at pH 10-12.
Mechanochemical polymerization in PAA/acrylamide (AA)/water mixtures have been also studied by stirring the mixtures vigorously with a homomixer. The initial rate of polymerization (Rp) was found to be expressed by
Rp=k[PAA]2[AA].
