초록 ▼

The present invention relates to a sulfonated polymer membrane and to a process for the preparation thereof. According to the process, a polymer film is irradiated, and the irradiated polymer film is sulfonated in order to link sulfonic acid groups thereto. According to the invention, the sulfonatio

The present invention relates to a sulfonated polymer membrane and to a process for the preparation thereof. According to the process, a polymer film is irradiated, and the irradiated polymer film is sulfonated in order to link sulfonic acid groups thereto. According to the invention, the sulfonation is continued until the total concentration of sulfonic acid groups in the membrane is 0.4-3.0 meq/g and they are homogeneously distributed in the membrane material in such a manner that their concentration in the middle of the membrane is at minimum 0.2 meq/g. With the help of the invention, it is possible by a rapid and simple process to prepare membranes the chemical and mechanical properties of which can be regulated by means of the selection of the initial film, by irradiation and by the sulfonation process.

대표청구항 ▼

The present invention relates to a sulfonated polymer membrane and to a process for the preparation thereof. According to the process, a polymer film is irradiated, and the irradiated polymer film is sulfonated in order to link sulfonic acid groups thereto. According to the invention, the sulfonatio

The present invention relates to a sulfonated polymer membrane and to a process for the preparation thereof. According to the process, a polymer film is irradiated, and the irradiated polymer film is sulfonated in order to link sulfonic acid groups thereto. According to the invention, the sulfonation is continued until the total concentration of sulfonic acid groups in the membrane is 0.4-3.0 meq/g and they are homogeneously distributed in the membrane material in such a manner that their concentration in the middle of the membrane is at minimum 0.2 meq/g. With the help of the invention, it is possible by a rapid and simple process to prepare membranes the chemical and mechanical properties of which can be regulated by means of the selection of the initial film, by irradiation and by the sulfonation process. of carbon atoms and 1-4 heteroatoms selected from the group consisting of N, O, and S substituted with 0-2 R4b; R2a,at each occurrence, is selected from H, CF3,C1-6alkyl, benzyl, C3-6carbocyclic groups substituted with 0-2 R4b,and 5-6 membered heterocyclic system consisting of carbon atoms and 1-4 heteroatoms selected from the group consisting of N, O, and S substituted with 0-2 R4b; R2b,at each occurrence, is selected from CF3,C1-4alkoxy, C1-6alkyl, benzyl, C3-6carbocyclic groups substituted with 0-2 R4b,and 5-6 membered heterocyclic system consisting of carbon atoms and 1-4 heteroatoms selected from the group consisting of N, O, and S substituted with 0-2 R4b; R2c,at each occurrence, is selected from CF3,OH, C1-4alkoxy, C1-6alkyl, benzyl, C3-6carbocyclic groups substituted with 0-2 R4b,and 5-6 membered heterocyclic system consisting of carbon atoms and 1-4 heteroatoms selected from the group consisting of N, O, and S substituted with 0-2 R4b; alternatively, R2and R2acombine to form a 5 or 6 membered saturated, partially saturated or unsaturated ring substituted with 0-2 R4bwhich comprises 0-1 additional heteroatoms selected from the group consisting of N, O, and S; R3,at each occurrence, is selected from H, C1-4alkyl, and phenyl; R3a,at each occurrence, is selected from H, C1-4alkyl, and phenyl; A is selected from: C3-10carbocyclic groups substituted with 0-2 R4; B is selected from: X--Y, C3-10carbocyclic groups substituted with 0-2 R4a,pyrrolidinyl substituted with 0-2 R4aand imidazolyl substituted with 0-2 R4a; X is selected from C1-4alkylene, and --C(O)--; Y is S pyrrolidinyl substituted with 0-2 R4a; R4,at each occurrence, is selected from =O, (CH2)rOR2,halo, C1-4alkyl, --CN, NO2,(CH2)rNR2R2a,(CH2)rC(O)R2b,NR2C(O)R2b,C(O)NR2R2a,NR<