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Citation: Zhang Qing-Da, Li Zhuo-Mei. Study on the Dissociation of A New Cationic Polyacrylamide[J]. Acta Physico-Chimica Sinica, ;1993, 9(05): 679-683. doi: 10.3866/PKU.WHXB19930520 shu

Study on the Dissociation of A New Cationic Polyacrylamide

1.
Institute of Polymer Science, Zhongshan University, Guangzhou 510275

Received Date: 10 February 1992
Available Online: 15 October 1993

A new kind of cationic polyacrylamide, PAm·MG, has been prepared by the modification of polyacrylamide (—CONH_z) with HCHO and dieyanodiamide. Three PAm·MG species with various degree of substitution (S) have been obtained by varying the ratio HCHO/-CONH_2. They are water-soluble and show effective floccu-lation for the active dyes. PAm·MG is a hydrochloride salt of weak polybase, whose dissociation depends on S, pH, and the concentration of added salt. η_(ap)/C of PAm·MG solution depends also on S and dissociation of the polymer, and on pH of solution as well. All these results are of significance in determining the optimum conditions for the synthesis and use of PAm·MG.
- Polyacrylamide; Cationic polyelectrolete; Dissociation of polybase
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