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- W2340377981 abstract "Novel monomer for polybenzimidazole was prepared and polymerized via aromatic nucleophilic substitution reaction. Thus, N-(4-fluorobenzoyl)-4-me thoxy- N'-naphthyl-1,2-phenylenediamine was synthesized from the reaction of 4-methoxy -N- naphthyl-1,2-phenylenediamine and 4-fluorobenzoyl chloride. N-(4-fluorobenzoyl)- 4-me thoxy-N'-naphthyl-1,2-phenylenediamine was converted to 2-(4-fluorobenzoyl)- 5-hydroxy -1-naphthylbenzimidazole by ring closure and deme thylation reaction. Poly- merization was done in N-cyclohexyl-2-pyrrolidinone (CHP) containing potassium ca r- bonate. The resulting polymer was soluble in N-me thyl-2-pyrrolidinone (NMP) and had inherent viscosity of 0.38 dL/g (NMP at 30 ℃). The glass transition temperature (g) of the polybenzimidazole was 270 ℃. The thermograv imetric analysis (TGA) thermogra ms of this polymer showed 5% weight losses at 550 ℃ in nitrogen and at 540 ℃ in air." @default.
- W2340377981 created "2016-06-24" @default.
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- W2340377981 date "2001-01-01" @default.
- W2340377981 modified "2023-09-27" @default.
- W2340377981 title "Synthesis of Polybenzimidazole Containing Bulky Side Group" @default.
- W2340377981 hasPublicationYear "2001" @default.
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