Poly(p-phenylene sulfonic acid-ran-2,5-benzophenone) pore-filling membranes with highly packed acid structure and their polymer electrolyte fuel cell performances

An Innovative Approach for the Preparation of High-Performance Electrospun Poly(p-phenylene)-Based Polymer Nanofiber Belts

“…9,10 To address this problem, numerous approaches have been studied, for example, preparing PPP thin films by electrochemical polymerization 11,12 and surface-assisted syntheses, 13−15 synthesizing soluble substituted PPP-based polymers (i.e., PPP derivations) via the approaches including design and synthesis of novel monomers, 16,17 copolymerization, 18,19 and incorporation of other chemical components (e.g., alkyl/ alkoxy, 20,21 aryl, 22 carboxyl, 23 and ester groups 24,25 ) as side chains in the repeating units. Although various PPP-based polymers have been made through the above approaches and have been demonstrated for many electronic applications such as light-emitting diodes, 26−28 solar cells, 29,30 and fuel cells, 31 these PPP-based polymers generally have low molecular weights, and they are often produced as powders, dilute solutions, or thin films on substrates (e.g., indium tin oxide (ITO) and metal).…”

“…Poly­( p -phenylene) (PPP)-based polymers are a class of conducting polymers with the repeating units containing the rigid-rod component of p -phenyl; − in recent decades, they have attracted extensive research interests because of extraordinary properties such as excellent thermal and chemical resistances, high mechanical and self-lubricating properties, and unique electrical and photoelectrical characteristics. − However, the unsubstituted PPP is infusible and insoluble in common organic solvents due to high rigidity of its macromolecular backbone, making the synthesis and direct processing intractable; as a result, many potential applications are restricted. , To address this problem, numerous approaches have been studied, for example, preparing PPP thin films by electrochemical polymerization , and surface-assisted syntheses, − synthesizing soluble substituted PPP-based polymers (i.e., PPP derivations) via the approaches including design and synthesis of novel monomers, , copolymerization, , and incorporation of other chemical components (e.g., alkyl/alkoxy, , aryl, carboxyl, and ester groups , ) as side chains in the repeating units. Although various PPP-based polymers have been made through the above approaches and have been demonstrated for many electronic applications such as light-emitting diodes, − solar cells, , and fuel cells, these PPP-based polymers generally have low molecular weights, and they are often produced as powders, dilute solutions, or thin films on substrates (e.g., indium tin oxide (ITO) and metal).…”