Polymers and fibers formed therefrom
View Patent ↗Sulfonated polyoxadiazole polymers containing groups selected from:
1. A sulfonated polyoxadiazole polymer containing a repeating unit of the formula comprising:
where M is a monovalent cation selected from lithium, sodium, ammonium or potassium.
2. The polymer of claim 1 , which additionally contains a repeating unit of
3. The polymer of claim 2 , which contains at least two repeating units of
4. The polymer of claim 3 , which contains:
wherein:
0.5<p<40, 5<m<95, 5<n<80 where p, m and n are integers.
5. The polymer of claim 1 , wherein:
the cation is lithium or sodium.
6. The polymer of claim 5 , wherein:
the cation is lithium.
7. The polymer of claim 1 , wherein:
the sulfonated polyoxadiazole polymer is a copolymer.
8. The polymer of claim 7 , wherein:
the polyoxadiazole copolymer comprises at least two aromatic ring systems selected from:
9. The polymer of claim 1 present as a fiber.
10. The fiber of claim 9 , wherein:
the fiber is dyeable.
11. The fiber of claim 10 , wherein:
the K/S value is at least about 6.
12. The fiber of claim 10 , wherein:
the K/S value is at least about 10.
13. The fiber of claim 11 , wherein:
the K/S value is at least about 12.
14. The fiber of claim 1 , wherein:
the fiber is dyed.