The behavior of amphiphilic molecular brushes in the vicinity of the Θ point has been studied by the methods of molecular hydrodynamics and optics upon variation of temperature. As objects of investigation, graft copolymers with polyimide main chain and poly(methyl methacrylate) and polystyrene side chains were chosen. The samples studied differed in the backbone and side chain lengths at a similar degree of grafting. The molecular mass of the samples under investigation was varied in a sevenfold range. For comparison, linear poly(methyl methacrylate) and polystyrene have been studied. It has been shown that the behavior of molecular brushes and linear polymers in the vicinity of the Θ point differs significantly. A more rapid gain in intrinsic viscosity of the solutions of graft copolymers in the vicinity of the Θ point is explained by the simultaneous increase in the volume of macromolecules and in their shape asymmetry.

通过分子流体动力学和光学学方法研究了温度变化时两点分子刷在Θ点附近的行为。作为研究的对象，选择了具有聚酰亚胺主链和聚（甲基丙烯酸甲酯）和聚苯乙烯侧链的接枝共聚物。研究的样品在相似的接枝度上，主链和侧链的长度不同。被研究样品的分子量在七倍范围内变化。为了比较，已经研究了线性聚（甲基丙烯酸甲酯）和聚苯乙烯。已经显示出在θ点附近的分子刷和线性聚合物的行为显着不同。