On the Studies of Reactivity of Pulps for Acetilation(II)

II. On the Activation Behaviours of Pulps in Acetic Acid

Abstract

Activation behaviours of pulps in acetic acid are estimated by sulphuric acid adsorption. When pulps are activated in acetic acid at elevated temperature, then, the degree of polymerization of the original pulps are decreased markedly, but the amounts of sulphuric acid absorbed are increased. When the time of pretreatment in acetic acid is too long, then it was found that the amounts of sulphuric acid absorbed is decreased only by the case of low sulphuric acid concentration. It seems that this decreasing of sulphuric acid absorbed by pulp may depend upon some new organizations which growthed by degraded cellulose chain during prolonged treatment and this new organization is very unstable for the concentration of sulphuric acid.