抄録
Concerning the graft polymerization of cellulose using Ce+4 as catalyst, fundamental study on the rate of oxidation reaction of cellulose which corresponds to the rate of free radical formation in graft polymerization was made.
The results are as follows:
(1) It was found that the oxidation reaction of cellulose by Ce+4 salt proceeds through cericcellulose complex, but the rates of complex formation and decomposition are nearly equal.
(2) From several experiments on the oxidation, it is estimated that there exist poor-reactive part, and good-reactive part which may correspond to C1 linkage in the end unit of cellulose molecule and initial oxidation may take place in the good-reactive part.
(3) Among several experimental conditions, the oxidation is remarkably influenced by pH. Oxidation rates of good-reactive part and poor-reactive part decrease rapidly over PH 1.8 and 1.0, respectively. Activation energy for poor-reactive part is twice that of good-reactive part.
(4) There exists a proportional relation between oxidation rate and the amount of acrylonitrile grafting.
