带相反电荷疏水缔合聚合物之间协同效应的研究

Studies on Synergistic Effect of Hydrophobically Associating Polymers with Opposite Charges

通过自由基聚合合成了丙烯酰胺（AM）/丙烯酸钠（Na AA）/十六烷基二甲基烯丙基氯化铵（C16-DMAAC）的共聚物AP,丙烯酰胺（AM）/甲基丙烯酰氧乙基三甲基氯化铵（DMC）/C16DMAAC的共聚物DP,并通过红外光谱与1H-NMR对聚合物的结构进行了表征.同时,在10000 mg/L的Na Cl溶液中,将聚合物AP和DP混合后得到复合溶液,通过黏度、流变及荧光测试探究了2种带相反电荷聚合物之间的协同效应及机理.表观黏度测试表明,当AP与DP的质量比为7∶3时,复合溶液的表观黏度远高于AP和DP溶液的表观黏度,说明聚合物之间产生了显著的协同效应.当p H=6~8时,聚合物AP和DP溶液之间的协同效应较强.当聚合物浓度为2000 mg/L,Na Cl浓度为15000 mg/L时,AP和DP的表观黏度分别为19.9、4.2 m Pa·s,而复合溶液的表观黏度高达370.2 m Pa·s,表现出较强的抗盐性能.对比复合溶液与单一聚合物溶液的平台区模量（G0）和特征松弛时间（TR）,发现复合溶液缔合点的密度和强度都高于单一聚合物溶液;对比复合溶液及单一聚合物溶液的I3/I1和Ie/Im值,发现复合溶液疏水微区数量高于单一聚合物溶液.

The copolymer （AP） of acrylamide, sodium acrylate, cetyl dimethyl ammonium chloride （C16DMAAC） and the copolymer （DP） of acrylamide, methaeryloxyethyltrimethyl ammonium chloride and C16DMAAC were synthesized by the radical copolymerization. Then the AP and DP were characterized by infrared spectroscopy and 1H-NMR. At a constant NaC1 concentration of 10000 mg/L,AP and DP were blended to form compound solutions to study the synergistic effect and mechanism between AP and DP with opposite charge by viscosity, rheology and fluorescent measurements. The viscosity measurements showed that the apparent viscosity of the compound solution （AP and DP quality ratio of 7：3 ） was greatly higher than that of the mono-component polymer solutions with the same mass concentration which indicated that a significant effect was existed between the two polymers. The synergistic effect was stronger between AP and DP when pH = 6 -8. When the concentration of polymer was 2000 mg/L and concentration of NaC1 was 15000 mg/L, the apparent viscosity of AP and DP was 19.9 mPa.s and 4.2 mPa.s,respectively,while the apparent viscosity of compound solution was up to 370.2 mPa. s,which demonstrated a strong salt resistance. Comparing the plateau modulus （ G0） and characteristic relaxation time （ TR） of compound solution with those of the mono-component polymer solutions, it was proved that the number and structural strength of associations of compound solution were higher than those of the mono-component polymer ones. Additionally, comparing I3/I1 and Ie/Im of compound solution with those of the mono-component polymer solutions,it was also proved that the hydrophobie microdomain number of compound solution was higher than that of mono-component polymer solutions.