Disclosed are rigid fluorinated monomers 9-phenyl-9-perfluoroalkylxanthene ##STR1## . The monomers have utility in the preparation of advanced high-performance polymers, particularly polyimides.
本发明涉及一种刚性
氟化单体9-苯基-9-
全氟烷基黄色素##STR1##。该单体在高性能聚合物,特别是聚
酰亚胺的制备中具有实用性。