| 摘要 |
Disclosed is a copolymer oapable of forming an optically anisotropic melt comprising recurring structural units of formulas I, II III; and IV and optionally V: I, II, III, IV, V , 37,907-F wherein each R is independently hydrogen, halogen, lower alkyl, methoxy or phenyl; R1 is lower alkyl; R2 is independently hydrogen, halogen, methoxy or phenyl. The present invention also relates to a process for preparing the copolymer. The copolymers of the present invention usually have a low melting point below 350.degree.C and can be readily melt extruded into fibers, films or the like. 37,907-F
|
