Polyaryletherketone composition
A polymer composition that contains a polyaryletherketone and a liquid crystalline polymer that includes repeating units derived from naphthenic hydroxycarboxylic acids, naphthenic dicarboxylic acids, or a combination thereof in an amount of more than about 15 mol. % of the polymer is provided.
1. A polymer composition comprising a polyaryletherketone and a liquid crystalline polymer that comprises repeating units derived from naphthenic hydroxycarboxylic acids, naphthenic dicarboxylic acids, or a combination thereof in an amount of more than about 15 mol. % of the polymer.
2. The polymer composition of claim 1 , wherein the repeating units derived from naphthenic hydroxycarboxylic acids, naphthenic dicarboxylic acids, or a combination thereof constitute from about 25 mol. % to about 50 mol. % of the liquid crystalline polymer.
3. The polymer composition of claim 1 , wherein the liquid crystalline polymer contains 2,6-naphthalenedicarboxylic acid in an amount of from about 15 mol. % to about 50 mol. %.
4. The polymer composition of claim 1 , wherein the liquid crystalline polymer further comprises repeating units derived from 4-hydroxybenzoic acid.
5. The polymer composition of claim 1 , wherein the liquid crystalline polymer further comprises repeating units derived from hydroquinone, 4,4-biphenol, or a combination thereof.
6. The polymer composition of claim 1 , wherein the polyaryletherketone has a glass transition temperature of from about 130° C. to about 230° C.
7. The polymer composition of claim 1 , wherein the polyaryletherketone has a melt viscosity of about 150 Pa-s or more, as determined in accordance with ISO Test No. 11443 at a shear rate of 1000 s −1 and temperature of 370° C.
8. The polymer composition of claim 1 , wherein the polyaryletherketone contains a moiety having the structure of Formula (I) and/or Formula (II):
wherein,
m and r are independently zero or a positive integer;
s and w are independently zero or a positive integer;
E and E′ are independently an oxygen atom or a direct link;
G is an oxygen atom, a direct link, or —O-Ph-O— where Ph is a phenyl group; and
Ar is one of the following moieties (i) to (vi), which is bonded via one or more of phenyl moieties to adjacent moieties:
9. The polymer composition of claim 8 , wherein the polyaryletherketone contains a repeat unit of the following general Formula (III):
wherein,
A and B are independently 0 or 1.
10. The polymer composition of claim 8 , wherein the polyaryletherketone contains a repeat unit of the following general Formula (IV);
wherein,
A and B are independently 0 or 1.
11. The polymer composition of claim 1 , wherein the polyaryletherketone is polyetheretherketone, polyetherketone, polyetherketoneketone, polyetherketoneetherketoneketone, polyetheretherketoneketone, polyether-diphenyl-ether-ether-diphenyl-ether-phenyl-ketone-phenyl, or a blend or copolymer thereof.
12. The polymer composition of claim 1 , wherein liquid crystalline polymers constitute from about 1 to about 60 parts relative to 100 parts by weight of polyaryletherketones in the composition.
13. The polymer composition of claim 1 , wherein liquid crystalline polymers constitute from about 0.5 wt. % to about 60 wt, % of the polymer composition.
14. The polymer composition of claim 1 , wherein polyaryletherketones constitute from about 40 wt. % to about 99.5 wt. % of the polymer composition.
15. The polymer composition of claim 1 , wherein the ratio of the melt viscosity of the polymer composition to the melt viscosity of the polyaryletherketone is about 0.98 or less.
16. The polymer composition of claim 1 , wherein the melt viscosity of the polymer composition is about 165 Pa-s or less, as determined in accordance with ISO Test No. 11443 at a shear rate of 1000 s −1 and temperature of 370° C.
17. The polymer composition of claim 1 , wherein the melt viscosity of the polymer composition is from about 1 to about 125 Pa-s, as determined in accordance with ISO Test No. 11443 at a shear rate of 1000 s −1 and temperature of 370° C.
18. The polymer composition of claim 1 , wherein the ratio of the complex viscosity to the melt viscosity of the polymer composition is from about 50 to about 1000, the complex viscosity being determined with a parallel plate rheometer at an angular frequency of 0.15 radians per second, temperature of 350° C., and at a constant strain amplitude of 1%, and the melt viscosity being determined in accordance with ISO Test No. 11443 at a shear rate of 1000 s −1 and temperature of 370° C.
19. The polymer composition of claim 1 , wherein the complex viscosity of the polymer composition is about 500 Pa-s or more, as determined with a parallel plate rheometer at an angular frequency of 0.15 radians per second, temperature of 350° C., and at a constant strain amplitude of 1%.
20. The polymer composition of claim 1 , wherein the crystallization half-time of the composition is about 45 minutes or less, determined at a temperature of 330° C.
21. The polymer composition of claim 1 , wherein the polyetherketone has a melt viscosity of from about 155 to about 250 Pa-s, as determined in accordance with ISO Test No. 11443 at a shear rate of 1000 s −1 and temperature of 370° C.
22. The polymer composition of claim 1 , wherein liquid crystalline polymers are employed in an amount of from about 5 to about 30 parts by weight relative to 100 parts by weight of polyaryletherketones in the composition.
23. The polymer composition of claim 1 , wherein polyaryletherketones constitute from about 50 wt. % to about 99 wt. % of the polymer composition.