Polyether ether ketone, and method for purification of polymer material
View Patent ↗A polyether ether ketone that is superior in mold flow performance, mechanical physical properties, and thermal stability is provided. A polyether ether ketone having a repeating unit represented by the formula: —Ar—C(═O)—Ar—O—Ar′—O— (wherein, Ar and Ar′ represent a substituted or unsubstituted phenylene group), the polyether ether ketone including: (A) a polymerization component having a molecular weight of not lower than 5,000 and lower than 2,000,000; and (B) a polymerization component having a molecular weight of not lower than 1,000 and lower than 5,000, wherein: the weight ratio of (A):(B) is 60:40 to 97:3; the content of (C) a polymerization component having a molecular weight of not lower than 100 and lower than 1,000 is from 0 and less than 0.2% by weight based on the total weight of the component (A), the component (B) and the component (C); and the polyether ether ketone exhibits a multimodal molecular weight distribution with a maximum peak molecular weight falling within the range of not lower than 5,000 and lower than 2,000,000.
1. A polyether ether ketone having a repeating unit represented by the following formula (1):
—Ar—C(═O)—Ar—O—Ar′—O— (1)
wherein, Ar and Ar′ may be the same or different, and represent a substituted or unsubstituted phenylene group,
the polyether ether ketone comprising:
(A) a polymerization component having a molecular weight of not lower than 5,000 and lower than 2,000,000; and
(B) a polymerization component having a molecular weight of not lower than 1,000 and lower than 5,000, wherein:
the weight ratio of (A):(B) is 60:40 to 97:3;
the content of (C) a polymerization component having a molecular weight of not lower than 100 and lower than 1,000 is from 0 and less than 0.2% by weight based on the total weight of the component (A), the component (B) and the component (C);
the polyether ether ketone exhibits a multimodal molecular weight distribution with a maximum peak molecular weight falling within the range of not lower than 5,000 and lower than 2,000,000; and
the inherent viscosity of a solution containing the polyether ether ketone in conc. sulfuric acid at a concentration of 0.1 g/dL is not less than 0.4 dL/g.
2. The polyether ether ketone according to claim 1 , which exhibits a peak molecular weight in the range of not lower than 1,000 and lower than 5,000 of the molecular weight.
3. The polyether ether ketone according to claim 1 , wherein the concentration of sodium cation is less than 25 ppm.
4. A resin composition comprising the polyether ether ketone according to claim 1 , and a reinforcing filler.