摘要:
A fluorinated ion exchange polymer is prepared by grafting at least one grafting monomer derived from trifluorostyrene on to at least one base polymer in a organic solvent/water mixture. These ion exchange polymers are useful in preparing catalyst coated membranes and membrane electrode assemblies used in fuel cells.
摘要:
A monomer comprising the structure (1a) or (1b) wherein Z comprises S, SO2, or POR wherein R comprises a linear or branched perfluoroalkyl group of 1 to 14 carbon atoms optionally containing oxygen or chlorine, an aryl or substituted aryl group of 6 to 12 carbon atoms, or an alkyl of 1 to 8 carbon atoms; RFcomprises a linear or branched perfluoroalkene group of 1 to 20 carbon atoms, optionally containing oxygen or chlorine; Q is chosen from F, —OM, NH2, —N(M)SO2R2F, and —C(M)(SO2R2F)2, wherein M comprises H, an alkali cation, or ammonium; and R2F groups comprise perfluorinated or partially fluorinated alkyl, and may optionally include ether oxygens; and n is 1 or 2 for (1a), and n is 1, 2, or 3 for (1b). These monomers are used in the preparation of homopolymers and copolymers that are useful in preparing polymer electrolyte membranes. Electrochemical cells, such as fuel cells, containing these membranes are also described.
摘要翻译:包含结构(1a)或(1b)的单体,其中Z包含S,SO 2或POR,其中R包含任选含有氧或氯的1至14个碳原子的直链或支链全氟烷基, 6至12个碳原子的芳基或取代的芳基或1至8个碳原子的烷基; R F包括任选含有氧或氯的1-20个碳原子的直链或支链全氟烯基; Q选自F,-OM,NH 2,-N(M)SO 2 R 2,-SO 2 F和-C(M)( 其中M包括H,碱性阳离子或铵;其中M包括H,碱金属阳离子或铵; 和R 2 F基团包括全氟化或部分氟化的烷基,并且可以任选地包括醚氧; 对于(1a),n为1或2,对于(1b),n为1,2或3。 这些单体用于制备可用于制备聚合物电解质膜的均聚物和共聚物。 还描述了含有这些膜的电化学电池,例如燃料电池。
摘要:
A fluorinated ion exchange polymer is prepared by grafting at least one grafting monomer derived from trifluorostyrene on to at least one base polymer in a water/alcohol mixture. These ion exchange polymers are useful in preparing catalyst coated membranes and membrane electrode assemblies used in fuel cells.
摘要:
A fluorinated ion exchange polymer is prepared by grafting at least one grafting monomer derived from trifluorostyrene on to at least one base polymer in the presence of a fluorosurfactant. These ion exchange polymers are useful in preparing catalyst coated membranes and membrane electrode assemblies used in fuel cells.