丙烯酰胺与4-乙烯基吡啶共聚物的季胺化及其若干性能

将丙烯酰胺 (AM)与 4 乙烯基吡啶 (4VP)的共聚物 (P(AM co 4VP) )用硫酸二甲酯季铵化 ,制备了系列吡啶季铵盐型阳离子丙烯酰胺共聚物 ,用FTIR、1 H NMR和紫外分光光度法表征了其分子结构与组成 ,并重点研究了其絮凝与缓蚀性 ,考察了阳离子度与分子量对其各种功能的影响 .研究结果表明 ,吡啶季铵盐型阳离子丙烯酰胺共聚物具有优良的絮凝 缓蚀等功能 ,且阳离子度越高 ,性能越好 ,而分子量对其性能亦有显著的影响 .

QUATERNIZATION OF ACRYLAMIDE/VINYLPYRIDINE COPOLYMERS AND SOME PROPERTIES

Copolymer of acrylamide and 4 vinyl pyridine(CPAV),which had been synthesized by radical copolymerization in solution of DMF/water(volume/volume=1∶1) using potassium persulfate as initiator,was quaternarized using dimethyl sulphate,and a series of copolymers having pendent quaternary pyridinium group have been synthesized,which have different degree of cationization and different molecular weight.The cationic copolymer was characterized by FTIR, 13 C NMR and UV analysis and its flocculation and corrosion inhibition properties were studied in detail.The cationic copolymers QCPAV displayed good properties in the experiments.The experimental results of flocculation for siliceous earth suspension showed that the transmittance of the supernatant layer of the siliceous earth suspension after being flocculated could come up to 100%; without need of adding any other coagulation aids.QCPAV has good flocculation effect under weak alkline condition (Optimum pH is about 8 and Optimum added amount is 1×10 -6 ～2×10 -6 g/g),and its performance was superior to that of non ion polyacrylamide(PAM).The experiments results of corrosion inhibition in 0 5?mol/L sulfuric acid solution showed that QCPAV was effective for the corrosion prevention of A 3 steel in sulfuric acid solution and corrosion inhibition rate to steel A 3 can reach 85%.It was found that the higher the degree of cationization is,the better flocculation and corrosion inhibition functions is,and the molecular weight of the copolymers also affects these functions obviously.The research results of the flocculation mechanism showed that the reason that the QCPAV has good flocculation property is the synergistic reaction of charge neutralization and bridging absorption.In the research of corrosion inhibition mechanism,the conclusions could be arrived at that QCPAV could form a compact adsorption film on the mental surface.The formation process of the film was closely associated with the physisorption through electrostatic gravitation and the chemisorption through coordination of π electrons of pyridine and d orbit of atom Fe.