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嵌段共聚物被誉为高分子合金,有着广泛的用途.嵌段共聚物在选择性溶剂中的胶束形成及其行为多年来引起人们广泛的注意.尽管至今用了许多实验手段进行了研究,然而对于这种胶束生成的微观过程的了解还是很不够的.正电子湮没技术对溶液中胶束的生成是十分灵敏的.本文对二嵌段共聚物聚苯乙烯-二甲基硅氧烷(PSDMS)/正庚烷胶束溶液体系作正电子湮没寿命参数测量,研究胶束形成对o-P_s生成机率的关系,为这类嵌段共聚物胶束形成微观机制提供证据.
Block copolymers known as polymer alloys, has a wide range of uses.Microplayer formation and behavior of block copolymers in selective solvents have drawn much attention for many years.Although many experiments have been carried out to date, , However, the understanding of the microscopic process of micelles formation is still not enough.The positron annihilation technique is very sensitive to the formation of micelles in solution.In this paper, the diblock copolymer polystyrene-dimethylsiloxane (PSDMS) / n-heptane micelles solution for positron annihilation lifetime parameter measurement to study the micellar formation of o-P_s probability of formation of the relationship for the formation of such micellar block copolymer micelles provide evidence.