抄録
This paper discusses the influence of molecular structure and composition of copolymer for comb-type polymers on the fluidity of CaCO3suspension with various types of inorganic electrolytes. When a larger amount of functional groups(-SO3-/-COO-) was introduced on the main chain or when the distance between the grafted chains was extended, the influence of inorganic electrolytes on the fluidity of CaCO3 suspension with comb-type polymer was decreased. These comb-type polymers can be adsorbed on limestone powder even though the adsorption sites were decreased when inorganic electrolytes were added. In contrast to the case of CO32- or PO43-, the addition of SO42- may possibly cause shrinking of the polymer chains as well as hindering the adsorption of the comb-type polymer. Comb-type polymers containing graft chains with some extent of chain length are effective for preventing the fluidity decrease when SO4 2- is added.
