Compounds, monomers, and polymers based on perfluoroalkyl and perfluoroalkyl-aryl dioxapentacene
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0500026A1
公开(公告)日:1992-08-26
Rigid fluorine-containing compounds, monomers, and polymers based on pentacyclic core systems, such as 12H,14H-5,7-dioxapentacene of formula (I) with perfluoroalkyl and/or aryl groups in the 12, 14 positions, and 5H,12H-7,14-dioxapentacene, of formula (II) with perfluoroalkyl and/or aryl groups in the 5,12 positions. These monomers have utility in the preparation of advanced high-performance polymers, particularly polyimides. The rigid pentacyclic core decreases the coefficient of thermal expansion of the polymers, while the fluorinated substituents improve the dielectric constant and water absorption properties. Each monomer unit contains within its pentacyclic core two-O-bridges, and two -CRRf bridges (where R is aryl, substituted aryl or perfluoroalkyl, and Rf is perfluoroalkyl).
基于五环核心系统的硬质含氟化合物、单体和聚合物,如式(I)的 12H,14H-5,7-二氧并五苯,其 12、14 位上含有全氟烷基和/或芳基;以及式(II)的 5H,12H-7,14-二氧并五苯,其 5、12 位上含有全氟烷基和/或芳基。这些单体可用于制备先进的高性能聚合物,尤其是聚酰亚胺。刚性的五环核心可降低聚合物的热膨胀系数,而含氟取代基则可提高介电常数和吸水性能。每个单体单元的五环核心都含有两个-O 桥和两个-CRRf 桥(其中 R 为芳基、取代芳基或全氟烷基,Rf 为全氟烷基)。