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测得了2—甲基丙烯酰氧乙基三甲基氯化铵(DM·MC)与AM于50±0.1℃,pH6.0以K_2S_2O_8为引发剂的水溶液聚合的竟聚率:r_1=0.20,r_2=1.94(M_1=AM,M_2=DM·MC);通过改变单体配比和加料方式,合成了不同分子量,不同离子度及不同链节分布均匀性的DM·MC—AM共聚物;以皂土和碘化银负电胶体为絮凝对象,用烧杯试验法考察了不同结构共聚物的絮凝性能。结果表明絮凝能力随离子度的增加而增大;链节序列分布不均匀的优于均匀的;分子量的影响是,对皂土胶体,分子量高的絮凝能力强,存在桥联机制;对碘化银胶体,与分子量无关,为中和机制。
The polymerization rate of 2-methacryloyloxyethyltrimethylammonium chloride (DM · MC) with AM aqueous solution with K 2 S 2 O 8 as initiator at 50 ± 0.1 ℃ and pH 6.0 was measured: r_1 = 0.20, r = 1.94 (M_1 = AM, M_2 = DM · MC). DM · MC-AM copolymers with different molecular weights, different ionic degrees and different chain segments were synthesized by changing the monomer ratio and feeding method. The bentonite and silver iodide negatively charged colloids were flocculated, and the flocculation properties of copolymers with different structures were investigated by beaker test. The results show that the flocculation ability increases with the increase of the ionic degree; the distribution of the chain segments is better than the non-uniform distribution; the influence of the molecular weight is that for the bentonite colloids, the flocculation ability with high molecular weight has a bridging mechanism; , Has nothing to do with the molecular weight, as the neutralization mechanism.