一种疏水缔合丙烯酰胺共聚物的合成及流变性能评价

Synthesis and Rheological Properties of a Hydrophobically Associating Acrylamide Copolymer

采用自由基胶束共聚法以丙烯酰胺（AM）和N-苄基-N-辛基丙烯酰胺（BOAM）为原料，合成了疏水缔合共聚物（AM-NaA-BOAM），并用红外光谱（FT-IR）和核磁共振（^1H-NMR）表征了共聚物的结构。溶液的流变性实验表明，当共聚物浓度大于600mg／L时，表观黏度显著增大，表现出疏水缔合行为，溶液的储能模量（G’）大于损耗模量（G”），且共聚物具有较好的耐温抗盐性能。

A hydrophobically associating acrylamide copolyrner （AM-NaA-BOAM） was prepared by radical micellar copolymerization using acrylamide （AM） and N-benzyl-N-octylacrylamide （BOAM） and characterized by Fourier transform infrared spectrum （FT-IR） and 1H nuclear magnetic resonance spectrum （1H-NMR）. The rheological behaviors of the copolymer solution were studied and the results show that the apparent viscosity increases with the increase of polymer concentration, when above the critical associating concentration （600rag/L）, the apparent viscosity increases sharply, indicating the forming of hydrophobical association in solution. The copolymer solution has good viscoelasticity, storage modulus（G＇） 〉 loss modulus（G＂）. The copolymer also exhibits good abilities of temperature resistance and salt tolerance.