Synthesis and properties of novel polyimides bearing sulfonated benzimidazole pendant groups

被引：18

作者：

Alvarez-Gallego, Yolanda

Nunes, Suzana Pereira

Lozano, Angel E.

de la Campa, Jos G.

de Abajo, Javier

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain

[2] GKSS Forschungszentrum Geesthacht GmbH, Polymer Res Inst, D-21502 Geesthacht, Germany

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2007年 / 28卷 / 05期

关键词：

fuel cells; monomers; polyimides; sulfonated benzimidazole; synthesis;

D O I：

10.1002/marc.200600700

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new diamine monomer containing benzimidazole-5-sulfonic acid has been synthesised. It has been reacted, alone or mixed with diaminodiphenyl ether, with naphthalenic dianhydride to attain polynaphthalimides in which the sulfonic acid functionality is borne by pendant benzimidazole groups. The presence of sulfonic and benzimidazole groups greatly affected the physical properties of the polyimides as the novel polymers were found to be soluble in polar organic solvents and exhibited a lower thermal resistance than their non-sulfonated counterparts. The polymer films exhibited good mechanical properties with tensile strength in the range 100-120 MPa and with moduli in the range 2.2-3.1 GPa. Sulfonic and benzimidazole city of the copolyimides, which showed water uptake up to 39%.

引用

页码：616 / 622

页数：7

共 26 条

[1] Sulfonated poly(2,5-benzimidazole) (SABPBI) impregnated with phosphoric acid as proton conducting membranes for polymer electrolyte fuel cells [J].