利用表面引发反向原子转移自由基聚合制备聚苯乙烯膜

Preparation of polystyrene film on glass surface via surface-initiated reverse atom transfer radical polymerization

将过氧引发基团接枝到玻璃基底表面,以CuCl2/2,2′-联吡啶为催化体系,通过表面引发反向原子转移自由基聚合反应(SI-RATRP)成功地构筑了聚苯乙烯(PS)膜,利用X-射线光电子能谱(XPS)、接触角仪、椭圆偏光仪、原子力显微镜(AFM)和凝胶色谱(GPC)对膜进行了表征。结果表明,聚苯乙烯膜厚度和ln([M]0/[M])与反应时间呈良好的线性关系,聚合物接枝层的分子量可控,显示出活性聚合的特征。

Polystyrene films were successfully prepared on glass substrate by surface-initiated reverse atom transfer radical poly- merization （SI-RATRP）. Peroxide groups used as the initiator were first grafted on glass surface, and then polystyrene was synthesized by reverse ATRP using CUC12/2, 2＇-bypyridine as the catalyst and ligand. Analysis of the polymer films was carried out using X-ray photoelectron spectroscopy, eontaet angle measure- ments, eUipsometry, atomic force microscopy, and gel permeation chromatography, respectively. The results indicated that polystyrene had successfully been grafted on glass surface and ki- netic studies revealed that the linear increase in polymer film thickness, the change of In（ [ M ]0/[ M ] ） with reaction time, and the molecular weight of the grafted polymer could be controlled with a ＂living＂ characteristic.