Which aqueous solution is used for alkaline hydrolysis of a polyacrylamide sample?

katsuki, Osaka 569, Japan(Received June 8, 1988)ABSTRACT: Alkaline hydrolysis of a polyacrylamide sample was performed in aqueous sodium hydroxide (Na0H) solutions at various Na0H concentrations to investigate the effects of hydrolysis conditions on the

Is polyacrylamide hydrolyzed?

Without hydrolyzing agents, polyacrylamide is re-sistant to hydrolysis in aqueous solutions at room tem-perature [13, 14], and at high temperatures (93o C) it is hydrolyzed at an appreciable rate [153 19]. The chem-ical stability of aqueous solutions of PAA at 60 and 100o C at pH 43 10 was studied in [20, 21].

What are the operating conditions for alkaline hydrolysis of polyacrylamide?

o. 12, 1988 Alkaline Hydrolysis of Polyacrylamidethe following operating conditions: 45° pulse, acquisition time, 0.68 s; pulse delay time, 2.5 s; accumulation, more than 7,000 times; com plete proton decoupled mode, temperature, 50-60°C; internal reference, DSS (sodium

Why is AA polymerization accelerated in alkaline media?

This is due to the enhanced influence of the SA mono-mer yielded by hydrolysis, whose polymerization is accelerated by the increasing NaOH concentration ; the AA polymerization rate in alkaline media is independent of pH . Raising the NaOH concen-tration results in enrichment of the copolymer in the SA units and a decrease in M (Table 2).

Is alkaline hydrolysis a second-order reaction?

The data reported in [45, 74] suggest the possibility of changing the degree of hydrolysis of the polymer by varying the NaOH concentration. It was shown that alkaline hydrolysis in suspensions, similarly to that in aqueous solutions, is a second-order reaction (first-order with respect to the alkali and PAA).

What is the kinetics of alkaline hydrolyis of PAA in aqueous solutions?

The kinetics of alkaline hydrolyis of PAA in aqueous solutions has been extensively studied [20, 223 30]. The reaction proceeds at a higher rate compared with low-molecular-weight amides, but, in contrast to them, it involves two stages.