Synthesis and Characterization of Poly[ 2, 2- （m-phenylene） -5, 5-bibenzimidazole ] in 1-butyl-3-methylimidazolium Chloride

• Published in: 东华大学学报（英文版） Vol. 30; no. 3; pp. 239 - 243
• Main Author: 白雪君 王彪 唐艳芳 文志伟 江建明 王华平
• Format: Journal Article
• Language: English
• Published: College of Material Science and Engineering, Donghua University, Shanghai 201620, China%College of Material Science and Engineering, Donghua University, Shanghai 201620, China 2013; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
• Subjects: 化学; 化学原理; 化学方法; 高分子化学; synthesis; 1-butyl-3-methylimidazolium chloride([BMIM] Cl); ionic liquids(ILs); polybenzimidazole (PBI)
• ISSN: 1672-5220

Poly[ 2, 2-（m.phenylene） -5, 5-bibenzimidazole] （mPBI） were synthesized by mixing 3, 3＇, 4, 4＇-tetraaminobiphenyl and isophthallc acid in 1 -butyl-3 -methyUmidazolinm chloride （ E BMIM] CI）. Intrinsic viscosity of mPBI polymers was 0.67 dL/g which was measured in 96% sulfuric acid. The polymer was characterized by Fourier transform infrared spectroscopy （FTIR）, nuclear magnetic resonance （ 1H-NMR ）, and thermogravimetric analysis （TGA）. The effects of polymerization conditions on the intrinsic viscosity of mPBI were investigated. It showed that the molecular weight of polymer mainly depended on pre-reaction time and reaction temperature. Comparison of structure and properties of mPBI synthesized in ionic liquids（ILs） and polyphosphoric acid was also reported. It indicates that the ionic liquids are a kind of good solvents in synthesis process of m_PBI and ionic liquids mainly affect molecular weight of mPBL