Six highly fluorinated poly(arylene ether)s were prepared by using a nucleophilic polycondensationreaction and their sulfonation selectivity was investigated.Single site of each repeated unit on pendant phenylgroup co...Six highly fluorinated poly(arylene ether)s were prepared by using a nucleophilic polycondensationreaction and their sulfonation selectivity was investigated.Single site of each repeated unit on pendant phenylgroup could be obtainedviathe postsulfonation approach under mild reaction conditions.Phenylated fluorina-ted poly(arylene ether)(Ph-FPAE) showed more excellent controllability over substituted sites and sulfonationdegree when chlorosulfonic acid was used as sulfonation reagent.The resulting sulfonated Ph-FPAE(Ph-SF-PAE) exhibited good thermal stability,solubility and hot-water dimensional stability,and also had a protonconductivity of 0.10 S/cm at 100℃.The results showed that Ph-SFPAE might be a candidate material forproton exchange membrane in fuel cell applications.展开更多
A bromine-containing poly(arylene ether sulfone) was synthesized from a(4-bromo)phenylhydroquinone monomer.A phosphonated derivative was prepared based on above brominated polymer using palladium-catalyst.Aimed at imp...A bromine-containing poly(arylene ether sulfone) was synthesized from a(4-bromo)phenylhydroquinone monomer.A phosphonated derivative was prepared based on above brominated polymer using palladium-catalyst.Aimed at improving the properties for fuel cell applications,a composite membrane was obtained by incorporating sulfonic acid-functionalized polysilsesquioxane into the phosphonated polymer through a sol-gel processing.Both phosphonated membrane and its hybrid membranes show good thermal and dimensio-nal stability.The hybrid membrane has low methanol permeability of 1.07×10-7 cm2/s and proton conducti-vity of 0.06 S/cm at 80 ℃.展开更多
文摘Six highly fluorinated poly(arylene ether)s were prepared by using a nucleophilic polycondensationreaction and their sulfonation selectivity was investigated.Single site of each repeated unit on pendant phenylgroup could be obtainedviathe postsulfonation approach under mild reaction conditions.Phenylated fluorina-ted poly(arylene ether)(Ph-FPAE) showed more excellent controllability over substituted sites and sulfonationdegree when chlorosulfonic acid was used as sulfonation reagent.The resulting sulfonated Ph-FPAE(Ph-SF-PAE) exhibited good thermal stability,solubility and hot-water dimensional stability,and also had a protonconductivity of 0.10 S/cm at 100℃.The results showed that Ph-SFPAE might be a candidate material forproton exchange membrane in fuel cell applications.
文摘A bromine-containing poly(arylene ether sulfone) was synthesized from a(4-bromo)phenylhydroquinone monomer.A phosphonated derivative was prepared based on above brominated polymer using palladium-catalyst.Aimed at improving the properties for fuel cell applications,a composite membrane was obtained by incorporating sulfonic acid-functionalized polysilsesquioxane into the phosphonated polymer through a sol-gel processing.Both phosphonated membrane and its hybrid membranes show good thermal and dimensio-nal stability.The hybrid membrane has low methanol permeability of 1.07×10-7 cm2/s and proton conducti-vity of 0.06 S/cm at 80 ℃.
