Production of a functionalized polytriazole polymer
View Patent ↗A method for the production of a functionalized polytriazole polymer, particularly a poly(1,2,4-triazole)-polymer, includes the steps of (a) mixing a hydrazine salt, particularly hydrazine sulfate, with at least an aromatic and/or heteroaromatic dicarboxylic acid and/or at least a dicarboxylic acid derivate in polyphosphoric acid and if necessary further components for obtaining a solution; (b) heating the solution in a protective gas atmosphere for obtaining polyhydrazides and adding aromatic and/or heteroaromatic primary amines to the solution; and (c) precipitating a polymer. If necessary, neutralization in a basic solution may be carried out.
1. A functionalized polytriazole polymer obtained by a method comprising the steps of:
a) mixing a hydrazine salt with at least one of a dicarboxylic acid and a dicarboxylic acid derivative in polyphosphoric acid to obtain a solution;
b) heating the solution in a protective gas atmosphere and adding at least one primary amine to the solution to form polytriazoles, wherein said primary amine is selected from a group consisting of aromatic primary amines and heteroaromatic primary amines; and
c) precipitating a polymer from the solution, wherein the functionalized polymer is soluble in aprotic polar solvents and in strong acids,
wherein a molar ratio S/C of sulfur to carbon is between 0.018 and 0.400.
2. The functionalized polymer according to claim 1 , having a molecular weight approximately in a range of 10 5 g/mol or above.
3. The functionalized polymer according to claim 1 , having an intrinsic viscosity, measured in dimethylsulfoxide, within a range between 1 and 5 dL/g.
4. A membrane comprising a functionalized polymer according to claim 1 .
5. The membrane according to claim 4 for use in a fuel cell.
6. A fiber comprising a functionalized polymer according to claim 1 .
7. The functionalized polymer according to claim 1 , wherein a molar ratio N/C of nitrogen to carbon is between 0.168 and 0.175.