Proton exchange membrane and method for manufacturing the same

A method for forming a proton exchange membrane, comprising:

• copolymerizing a bismaleimide and a barbituric acid to form a hyper-branched polymer;
• replacing water and alcohol of a sulfonated tetrafluorethylene copolymer aqueous solution with dimethyl acetamide (DMAc);
• adding 10 to 15 parts by weight of the hyper-branched polymer to 90 to 85 parts by weight of the sulfonated tetrafluorethylene copolymer in the DMAc solution to form a mixture;
• standing and heating the mixture to 50° C. for inter-penetration of the hyper-branched polymer and the sulfonated tetrafluorethylene copolymer, thereby forming an inter-penetrated polymer solution;
• coating the inter-penetrated polymer solution on a substrate;
• and
• baking and pre-treating the coating to remove residue DMAc to complete formation of the proton exchange membrane.