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采用耗散粒子动力学方法模拟研究了rod-coil-rod三嵌段共聚物在稀溶液中的聚集行为.分别考察了rod-coil嵌段的相互作用、溶剂性质、共聚物浓度以及coil嵌段长度对聚集体形貌的影响.模拟结果发现,随着rod-coil相互排斥作用的增加,共聚物由球形转变成洋葱状、笼形和柱状结构.随着coil嵌段疏水性的增加,笼形转变成洋葱状和补丁状结构.给出了聚集体形貌随共聚物浓度和coil长度变化的相图.当浓度较小和coil嵌段较长时,共聚物形成笼状聚集体,反之,则有利于洋葱状结构的形成.
The behavior of rod-coil triblock copolymers in dilute solution was investigated by means of dissipative particle dynamics simulations. The interactions of rod-coil block, solvent properties, copolymer concentration, Length on the aggregate morphology.The simulation results show that with the mutual repulsion of rod-coil increases, the copolymer changes from spherical to onion, cage and columnar structure.With the increase of the hydrophobicity of the coil block, the cage Shaped into an onion-like and patch-like structure.The phase morphology of the aggregate morphology as a function of copolymer concentration and coil length is given.When the concentration is small and the coil block is longer, the copolymer forms cage aggregates and vice versa , It is conducive to the formation of onion-like structure.