Rheology, Spinnability, and Fiber Properties of AB-Benzimidazole Solutions in Polyphosphoric Acid.
| Title: | Rheology, Spinnability, and Fiber Properties of AB-Benzimidazole Solutions in Polyphosphoric Acid. |
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| Authors: | Vashchenko AF; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospekt, 29, 119991 Moscow, Russia.; Skvortsov IY; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospekt, 29, 119991 Moscow, Russia.; Kuzin MS; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospekt, 29, 119991 Moscow, Russia.; Mironova MV; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospekt, 29, 119991 Moscow, Russia.; Ponomarev II; A.N. Nesmeyanov Institute of Organoelement Compounds RAS, 28 Vavilova St., 119334 Moscow, Russia. |
| Source: | Polymers [Polymers (Basel)] 2025 Aug 29; Vol. 17 (17). Date of Electronic Publication: 2025 Aug 29. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: MDPI Country of Publication: Switzerland NLM ID: 101545357 Publication Model: Electronic Cited Medium: Internet ISSN: 2073-4360 (Electronic) Linking ISSN: 20734360 NLM ISO Abbreviation: Polymers (Basel) Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Basel : MDPI |
| Abstract: | This study examines the rheology and fiber formation of poly(2,5(6)-benzimidazole) (ABPBI) solutions in polyphosphoric acid (PPA) at 12.5 wt%. These solutions exhibit typical features of associative polymer systems, such as pronounced shear thinning and high elasticity. The activation energy of the viscous flow increases with the polymer concentration, reaching 29 kJ/mol at 12.5 wt%, but remains significantly lower than in phosphoric acid solutions. This indicates more efficient solvation and chain mobility in PPA. A comparison with two superbasic solvent systems further highlights the critical role of the solvent nature in flow mechanisms and associative interactions. Model coagulation experiments revealed how the non-solvent composition controls the fiber morphology and solidification. Under optimized conditions, homogeneous monolithic fibers with good mechanical performance were obtained. These findings provide new insight into the physicochemical principles of ABPBI fiber formation and establish PPA as a promising solvent for producing high-performance fibers. |
| References: | Ultrason Sonochem. 2019 Apr;52:69-76. (PMID: 30528487); ACS Appl Mater Interfaces. 2025 Jun 4;17(22):32928-32935. (PMID: 40417788); Materials (Basel). 2023 Jan 13;16(2):. (PMID: 36676530); Polymers (Basel). 2024 Apr 23;16(9):. (PMID: 38732654); Polymers (Basel). 2022 Nov 01;14(21):. (PMID: 36365642); Materials (Basel). 2022 Jan 21;15(3):. (PMID: 35160753) |
| Grant Information: | State Program of TIPS RAS A.V. Topchiev Institute of Petrochemical Synthesis |
| Contributed Indexing: | Keywords: AB-polybenzimidazole; drop coagulation modeling; fiber spinning; optical microscopy; phase separation; polyphosphoric acid; rheology |
| Entry Date(s): | Date Created: 20250913 Date Completed: 20250915 Latest Revision: 20250916 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC12430976 |
| DOI: | 10.3390/polym17172347 |
| PMID: | 40942266 |
| Database: | MEDLINE |
Journal Article