Rigid Fluorinated Polyimides with Well-Defined Polystyrene/Poly(pentafluorostyrene) Side Chains from Atom Transfer Radical Polymerization
作者:G. D. Fu、E. T. Kang、K. G. Neoh、C. C. Lin、D. J. Liaw
DOI:10.1021/ma0506435
日期:2005.9.1
copolymers consisting of rigid fluorinated polyimide (FPI) backbone and well-defined polystyrene (PS) side chains (FPI-cb-PS), or poly(pentafluorostyrene) (PFS) side chains (FPI-cb-PFS), were synthesized by atom transfer radical polymerization (ATRP) from the bromide-containing FPI macroinitiators (FPI-Br). The sizes of the FPI-Br macroinitiators (consisting of 14 repeat units in the rigid backbone) and cleaved
由硬质氟化聚酰亚胺(FPI)主链和定义明确的聚苯乙烯(PS)侧链(FPI- cb -PS)或聚(五氟苯乙烯)(PFS)侧链(FPI- cb -PFS)组成的梳状共聚物由含溴的FPI大分子引发剂(FPI-Br)通过原子转移自由基聚合(ATRP)合成。FPI-Br大分子引发剂(由刚性骨架中的14个重复单元组成)和裂解的PS和PFS刷子(分别由35-144和32-93个重复单元组成)的大小是根据凝胶渗透色谱法(GPC)估算的结果。PS和PFS侧链的长度由1确定1 H NMR光谱与通过GPC或理论分析确定的光谱相当。X射线光电子能谱(XPS)结果证实了在各自的FPI- cb -PS和FPI- cb -PFS共聚物上均存在接枝的PS和PFS侧链,并且在FPI重复单元中每个FPI重复单元存在一种ATRP溴化引发剂。 FPI-Br宏观引发剂。通过原子力显微镜(AFM)对由20-30 nm长的刚性FPI棒(骨架)和4-6