【摘要】 在(60)Coγ射线引发下丙烯腈(AN)可以很容易地接枝到淀粉(S)上,这种接枝共聚物(SPAN)可以制成高吸水树脂(HS-PAN)。本文报导了有关影响接枝率的因素,如剂量、剂量率、淀粉-丙烯腈摩尔比,并测得接枝PAN的分子量级为10~5。对于HS-PAN的性质也作了初步探讨。更多还原

【Abstract】 Graft copolymcr starch-g-acrylonitrile has been prepared by irradiation from a cobalt source. The conversion of acrylonitrile to synthetic polymer icreased with the increase of total dose at the same dose rate,also with the increase of dose rate at the same dose . On the other hand .the conversion of acrylonitrile varied with the mole ration of starch to acrylonitrile at a certain total dose. The synthetic polymer has relatively higher content of ungrafted polymer (homopolymcr). The molecular weights of grafted PAN measured by Ubbelohde capillary viscometer in DMF solution, have a level of about 105.Starch-g-polyacrylonitrile graft copolymcr was hydrolyzed with 2 wt% aqueous NaOH at 100 C to polyelcctrolytes (HS-PAN)containing carboxyl and amide functionalities. Viscosities of HS-PAN dispersions were pH dependent,, The effect of sodium chloride on 1 % dispersion viscosities of US-PAN has also been studied.更多还原