A perfluorinated polyimide having a repeating unit represented by general formula (1):
and a perfluorinated poly(amic acid) having a repeating unit represented by general formula (6):
wherein R1 is a tetravalent organic group; and R2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R1 and R2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and an optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)tetrafluorobenzene dianhydride, 1,4-difluoropyromellitic anhydride, 1,4-bis(3,4-dicar- boxytrifluorophenoxy)tetrafluorobenzene, 1,4-difluoro-pyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy)-tetrafluorobenzene as well as methods preparing them. The perfluorinated polyimide has a thermal stability and has a low optical loss in an optical communication wavelength region (1.0 to 1.7 mm).
一种
全氟聚
酰亚胺,其重复单元由通式(1)表示:
和具有通式(6)代表的重复单元的
全氟聚(胺):
其中 R1 是四价有机基团;R2 是二价有机基团,条件是 R1 和 R2 所含碳原子和一价元素之间的
化学键完全是碳
氟键;制备它们的方法;以及包括
全氟聚
酰亚胺的光学材料。1,4-双(3,4-二羧基三
氟苯氧基)
四氟苯二酸酐、
1,4-二氟苯甲酸酐、1,4-双(3,4-二羧基三
氟苯氧基)
四氟苯、1,4-双(3,4-二
氰基三
氟苯氧基)
四氟苯以及制备它们的方法。
全氟聚
酰亚胺具有热稳定性,在光通信波长区域(1.0 至 1.7 毫米)的光学损耗较低。