摘要
Isotactic-and atactic-poly(N-propyl-2-vinylpyridinium bromide)QIP2VP and QAP2VP were used asflocculants for kaolin suspension.The effects of their molecular structure of floeculation were studied.Theresults are as follows:(1)The ability of flocculation of QAP2VP is better than that of QIP2VP.(2)The flocculating efficiency of QAP2VP,but not QIP2VP,increased as the molecular weight in-creased.(3)In the range of lower degree of quaternization,the efficiency of flocculation increased as thedegree of quaternization of flocculants decreased.(4)An abnormal phenomenon,which is considered as the“homocharge stabilization”,was discoveredat a certain concentration of flocculants.(5)An equation of the relationship among the experimental parametars,such as sedimentation rate,sedimentation volume and turbidity,was derived.
Isotactic-and atactic-poly(N-propyl-2-vinylpyridinium bromide)QIP2VP and QAP2VP were used as flocculants for kaolin suspension.The effects of their molecular structure of floeculation were studied.The results are as follows: (1)The ability of flocculation of QAP2VP is better than that of QIP2VP. (2)The flocculating efficiency of QAP2VP,but not QIP2VP,increased as the molecular weight in- creased. (3)In the range of lower degree of quaternization,the efficiency of flocculation increased as the degree of quaternization of flocculants decreased. (4)An abnormal phenomenon,which is considered as the“homocharge stabilization”,was discovered at a certain concentration of flocculants. (5)An equation of the relationship among the experimental parametars,such as sedimentation rate, sedimentation volume and turbidity,was derived.
