Claims
- 1. A film- or fiber-forming polymer comprising recurring units of the formula ##STR57## wherein R and R.sup.1 are each hydrogen, alkyl, aryl, alkaryl or aralkyl; and A is a divalent radical selected from the group consisting of: ##STR58## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, and each p is an integer from 1 to 3, said U and Wp substitution being sufficient to provide the aromatic nuclei of said radical with a noncoplanar molecular configuration with respect to each other, and ##STR59## where each of Y and Z is hydrogen or a substituent other than hydrogen and each t is an integer from 1 to 4, with the proviso that when each said Z is hydrogen, at least one said Y substituent is a substituent other than hydrogen positioned on the corresponding nucleus ortho with respect to the ##STR60## moiety of said radical, said Z and Yt substitution being sufficient to provide the aromatic nuclei of said radical with a non-coplanar molecular configuration with respect to each other.
- 2. The film- or fiber-forming polymer of claim 1 wherein said divalent radical A is a radical having the formula ##STR61## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, and each p is an integer from 1 to 3, said U and W substitution being sufficient to provide the aromatic nuclei of said radical with a noncoplanar molecular configuration with respect to each other.
- 3. The film- or fiber-forming polymer of claim 2 wherein each said p is the integer 3 and each of said U and W is halogen.
- 4. The film- or fiber-forming polymer of claim 2 wherein each said U and W is fluoro.
- 5. The film- or fiber-forming polymer of claim 2 wherein each of R and R.sup.1 is hydrogen.
- 6. The film- or fiber-forming polymer of claim 5 wherein said A radical has the formula ##STR62## wherein each U is halo, nitro, alkoxy or substitutedalkyl.
- 7. The film- or fiber-forming polymer of claim 6 wherein said substitutedalkyl is trifluoromethyl.
- 8. The film- or fiber-forming polymer of claim 2 wherein each said p is the integer 3 and each of said U and W is is fluoro.
- 9. The film- or fiber-forming polymer of claim 8 wherein each of R and R.sup.1 is hydrogen.
- 10. The film- or fiber-forming polymer of claim 1 wherein said divalent radical A is a radical having the formula ##STR63## where each of Y and Z is hydrogen or a substituent other than hydrogen and each t is an integer from 1 to 4, with the proviso that when each said Z is hydrogen, at least one said Y substituent is a substituent other than hydrogen positioned on the corresponding nucleus ortho with respect to the ##STR64## moiety of said radical, said Z and Y.sub.t substitution being sufficient to provide the aromatic nuclei of said radical with a non-coplanar molecular configuration with respect to each other.
- 11. The film- or fiber-forming polymer of claim 10 wherein said divalent radical A has the formula ##STR65## wherein at least one of said Y substituents is other than hydrogen.
- 12. The film- or fiber-forming polymer of claim 11 wherein at least one said Y substituents is halo or alkoxy.
- 13. The film- or fiber-forming polymer of claim 10 wherein said divalent radical A has the formula ##STR66## wherein Z is a substituent other than hydrogen.
- 14. The film- or fiber-forming polymer of claim 13 wherein said Z substituent is halo.
- 15. The film- or fiber-forming polymer of claim 10 wherein each of R and R.sup.1 is hydrogen.
CROSS REFERENCE TO RELATED APPLICATION
This application is a division of our copending U.S. patent application, Ser. No. 238,069, filed Mar. 2, 1981, now U.S. Pat. No. 4,384,107.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3130182 |
Frazer |
Apr 1964 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
238069 |
Mar 1981 |
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