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用淀粉-聚丙烯酰胺接枝共聚物(S-g-PAM)同多聚甲醛及亚硫酸钠反应,合成了淀粉-磺甲基化聚丙烯酰胺接枝共聚物(S-g-SPAM)。该磺化物的水溶液在试验浓度范围内(0.1～1.0％),为假塑性流体,对高岭土悬浮液的絮凝,由沉降速度,上层清液相对吸光度可知,S-g-SPAM(接枝链分子量为1.03×10~5,磺甲基化度30％)的絮凝能力优于相应的未磺化的S-g-PAM,也比聚丙烯酰胺(分子量2.5×10~6)强。
The starch-sulfomethylated polyacrylamide graft copolymer (S-g-SPAM) was synthesized by the reaction of starch-polyacrylamide graft copolymer (S-g-PAM) with paraformaldehyde and sodium sulfite. The aqueous solution of the sulfonates in the experimental concentration range (0.1 ~ 1.0%), a pseudoplastic fluid, the suspension of the kaolin flocculation, from the settling velocity, the relative supernatant relative absorbance, Sg-SPAM (graft chain molecular weight of 1.03 × 10 ~ 5, degree of sulfomethylation 30%) than the corresponding unsulfonated Sg-PAM, also polyacrylamide (molecular weight 2.5 × 10 ~ 6) stronger.