Fluorenyl cardo copolyimides containing poly(ethylene oxide) segments: Synthesis, characterization, and evaluation of properties
作者： Eva M. Maya , Dulce M. Muñoz , Angel E. Lozano , Javier de Abajo , Jose G. de la Campa
DOI: 10.1002/POLA.23114
关键词:
摘要: A set of new block copolyimides containing fluorenyl cardo moieties (FR) in the polyimide blocks and poly(ethylene oxide) (PEO) sequences has been prepared using two-step method synthesis. The combination both led to novel with good solubility a variety solvents, which could easily be processed into films. Copolyimides PEO content from 30 56 wt % were amorphous, showed mechanical properties, absorbed less water than other PEO-containing polyimides previously reported. higher (60 65%) crystallinity yielded soft All copoly- mers two glass transition temperatures, first one around � 25 C attrib- uted segments, second at much temperature, corresponded domains. thermal degradation occurred steps, being associated segments generalized aromatic decomposition. V 2008 Wiley
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