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Compositions having a fluoropolymer with a nitrile-containing cure site and at least a) a mono azide with at least one functional group in the beta position, or b) a polyazide, as a curing agent as well as methods and articles thereof are described. Articles of this disclosure are found to exhibit e

Compositions having a fluoropolymer with a nitrile-containing cure site and at least a) a mono azide with at least one functional group in the beta position, or b) a polyazide, as a curing agent as well as methods and articles thereof are described. Articles of this disclosure are found to exhibit excellent chemical resistance and thermal stability.

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1. A composition comprising: a. a fluoropolymer having a nitrile-containing cure site; andb. a curing agent, wherein the curing agent is an azide selected from: i) a mono azide with at least one functional group in a beta position, ii) a polyazide, or iii) combinations thereof. 2. A composition acco

1. A composition comprising: a. a fluoropolymer having a nitrile-containing cure site; andb. a curing agent, wherein the curing agent is an azide selected from: i) a mono azide with at least one functional group in a beta position, ii) a polyazide, or iii) combinations thereof. 2. A composition according to claim 1 wherein the curing agent is at least one of: N3CH2CH2OCH2CHOHCH2N3, CH3OCH2CHOHCH2N3, CH3OCH2CH(OCONHC4H9)CH2N3, CH3CH2C(CH2OCH2CHOHCH2N3)3, N3CH2CH2O [CH2CH(CH2N3)O]6H, CH3CH2C[CH2(OCH2CH(CH2N3))2OH]3, CH3CH2C[CH2(OCH2CH(CH2N3))2OCOCH3]3, N3CH2CH2OCONH(CH2)6NHCOOCH2CH2N3, (CH3)3CNHCOOCH2CH2N3, C4H9NDCOOCH2CH2N3, C6H5NHCOOCH2CH2N3, C4F9OCFCF3NDCOOCH2CH2N3, DOCH2CH2N3, HOCH2CH2N3, (CH3)2NCH2CH2N3, and [(CH3)3NCH2CH2N3]+I−. 3. A composition according to claim 1, wherein the fluoropolymer is a partially fluorinated plastic, a perfluoroplastic, a partially fluorinated elastomer, a perfluoroelastomer, or combinations thereof. 4. A composition according to claim 1, wherein the cure site is derived from at least one of the following cure-site monomers: CF2=CFO(CF2)LCN, CF2=CFO[CF2CF(CF3)O]q(CF2)yOCF(CF3)CN, and CF2=CF[OCF2CF(CF3)O]rO(CF2)tCN where L is 2 to 12, q is 0 to 4, y is 0 to 6, r is 1 to 2, and t is 1 to 4. 5. A composition according to claim 1, wherein the fluoropolymer is comprised of a monomer of perfluoromethyl vinyl ether and tetrafluoroethylene. 6. A composition according to claim 1, wherein the fluoropolymer has an integrated absorbance ratio of carbonyl-containing end groups of less than 0.08. 7. A composition according to claim 1, wherein the fluoropolymer has an integrated absorbance ratio of carbonyl-containing end groups of less than 0.06. 8. A composition according to claim 1, wherein the fluoropolymer has an integrated absorbance ratio of carbonyl-containing end groups of less than 0.025. 9. A method of curing a composition comprising curing a fluoropolymer having a nitrile-containing cure site in the presence of a curing agent as described in claim 1. 10. A composition according to claim 1 wherein the azide is selected from: i) UOCR2CR2N3 wherein U is H, D, or a urethane (—CO—NR2) and R is independently H, D, or an organic group; ii) R′2NCR2CR2N3 or A-R′3N+CR2CR2N3 wherein R′ is an organic group and A is an anion; iii) G(N3)m wherein m is an integer from 2 to about 10 and G is a m-valent organic group wherein at least two of the azido groups are connected via aliphatic carbon atoms wherein G may contain organic groups; or iv) combinations thereof, which may contain both nitrogen connected and oxygen connected beta-position groups, or any combination of azides i), ii), and iii). 11. A composition according to claim 10, wherein the azide is polyfunctional. 12. A composition according to claim 10, wherein the azide of selected from i) or ii) is monofunctional. 13. A composition according to claim 1, further comprising an additional curative, and optionally a coagent. 14. A composition according to claim 13, wherein the additional curative is at least one of: a triazine-forming cure, a peroxide cure, and an aminophenol cure. 15. A composition according to claim 1, further comprising a filler, wherein the filler is at least one of an organic filler or inorganic filler. 16. A composition according to claim 15, wherein the filler is at least one of silica, carbon black, and a mineral filler. 17. An article prepared by curing the composition of claim 1. 18. An article according to claim 17, wherein the article is at least one of an O-ring, a gasket, tubing, or a seal.