采用二元单体胶束共聚,合成了孪尾疏水改性丙烯酰胺/N,N-二辛基丙烯酰胺二元共聚物[简称P(AM/DiC8AM)],成功引入了疏水单体。用FTIR分析了各基团峰的归属,证明了共聚物为带有疏水基团的二元共聚物。特性粘数的测定结果表明:分子量M、疏水单体含量[H]增加,特性粘数[η]]增大,Huggins常数KH减少,平均线团密度ρequ减少;但随疏水链嵌段长度NH的增加,[η]增大,KH同样增大。随疏水单体含量[H]、分子量M、疏水链的嵌段长度NH增加,各聚合物溶液临界缔合浓度cac降低,疏水缔合的机率增加。 The bipyramidal hydrophobically modified acrylamide / N, N-dioctylacrylamide binary copolymer [P (AM / DiC8AM)] was synthesized by the copolymerization of binary monomer micelles, and the hydrophobic monomer was successfully introduced. The assignment of peaks of each group was analyzed by FTIR, demonstrating that the copolymer is a binary copolymer with hydrophobic groups. The results of intrinsic viscosity show that the molecular weight M, the content of hydrophobic monomer [H] increases, the intrinsic viscosity [η] increases, the Huggins constant KH decreases, and the mean clump density ρequ decreases. However, Increase, [η] increases, KH also increases. With the content of hydrophobic monomer [H], the molecular weight M, the length of NH of the hydrophobic chain increased, the critical concentration of cac of each polymer solution decreased and the probability of hydrophobic association increased.