New possibilities for the synthesis of high-molecular weight poly(2,5(6)-benzimidazole) and studies of its solutions in DMSO-based complex organic solvent

Autor:	A. S. Senchukova, Iv. I. Ponomarev, D. Yu. Razorenov, A. A. Lezov, N. V. Tsvetkov, I. I. Ponomarev, Yu. Yu. Rybkin, Yu. A. Volkova, K. M. Skupov
Rok vydání:	2020
Předmět:	Potassium hydroxide 010405 organic chemistry Dimethyl sulfoxide Intrinsic viscosity Viscometer General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Solvent chemistry.chemical_compound Monomer chemistry Dynamic light scattering Physical chemistry Methanol
Zdroj:	Russian Chemical Bulletin. 69:2320-2327
ISSN:	1573-9171 1066-5285
Popis:	New possibilities for the synthesis of high-molecular weight poly(2,5(6)-benzimidazole) (ABPBI) based on a new monomer, 3,4-diaminobenzoic acid monophosphate, in polyphosphoric acid medium at high monomer concentration under stirring and on a Teflon® surface without stirring are investigated. New complex solvent for ABPBI is found. This solvent is based on dimethyl sulfoxide, methanol, and potassium hydroxide. For the first time, molecular weight values are obtained by dynamic light scattering and viscometry in complex solvent. In addition, Kuhn segment values are estimated. Maximal molecular mass MDη value reaches 94 kDa. The values of macromolecular equilibrium rigidity A are estimated as 4.4–5.7 nm according to translational diffusion coefficient and 3.3 nm according to intrinsic viscosity measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cc424c63718d8e4e08f63edd43464402 https://doi.org/10.1007/s11172-020-3036-8 Zobrazit plný text záznamu Full text from SpringerLink