| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direct liquid type fuel cell diaphragm having both high proton conductivity and high alcohol impermeability. <P>SOLUTION: A polymerizable composition containing at least (a) a monocyclic aromatic polymerizable monomer prepared by bonding one polymerizable group, one or more methyl groups and one or more hydrogen atoms to a benzene ring and by bonding one of the methyl groups to the polymerizable group at a para position, (b) a cross-linking polymerizable monomer and (c) a polymerization initiator is brought into contact with a porous film to fill the polymerizable composition in void parts of the porous film, thereafter the polymerizable composition is polymerized and hardened, and thereafter a cation exchange group is introduced into the benzene ring originated from the monocyclic aromatic polymerizable monomer, whereby this direct liquid type fuel cell diaphragm is manufactured. For the monocyclic aromatic polymerizable monomer, p-methylstyrene is preferable. <P>COPYRIGHT: (C)2007,JPO&INPIT |
