抄録
The graft copolymerization of acrylnitrile onto wool fibers by H2O2_??_NaHSO3 redox method was studied with the following results.
1) The reaction rate of the graft copolymerization of AN. is expressed by the following equation as the MMA.1)
Where, θ…the degree of grafting for total AN. used.
k…the reaction rate constant of grafting.
t…the reaction time.
The apparent activation energy of AN. graft copolymerization calculated from the relation between lnK and 1/T by A rhenius equation. is 21.7 Kcal/mol. and the reaction rate constant K depends on the reduction catalytic concentration, but there is little effect on the reaction rate in the case of the concentration above 5% NaHSO3.
2) According to the IR. spectroscopic study, the characteristic absorption band can be found on the wave number 1020cm-1, presumably identified to the stretching vibration of the ether linkage. But, the grafting point of the wool which leads to graft copolymerization can not be thought of as the OH groups present in the keratin molecul from this result.
3) The molecular weight of the grafted polyacrylnitrile is above the order of 105; the tensile strength and Young's modulus, increase with the rising degree of grafting, but the elongation decrease.
4) The effects of the heat-setting on the AN. grafted wool are improved with increasing the degree of grafting.
Note. 1) J. Soc. Fiber Sci. and Tech., 22, Feb. (1966)
