High Molecular Weight AB-Polybenzimidazole and Its Solutions in a Complex Organic Solvent: Dissolution Kinetics and Rheology.
| Title: | High Molecular Weight AB-Polybenzimidazole and Its Solutions in a Complex Organic Solvent: Dissolution Kinetics and Rheology. |
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| Authors: | Skvortsov IY; A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Varfolomeeva LA; A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Ponomarev II; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Bld. 1, 119334 Moscow, Russia.; Skupov KM; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Bld. 1, 119334 Moscow, Russia.; Maklakova AA; A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Kulichikhin VG; A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia. |
| Source: | Polymers [Polymers (Basel)] 2022 Nov 01; Vol. 14 (21). Date of Electronic Publication: 2022 Nov 01. |
| 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: | AB-polybenzimidazole (ABPBI) dissolution kinetics in an eco-friendly complex acid-free solvent based on dimethyl sulfoxide (DMSO), methanol and KOH, and the rheological behavior of their solutions are investigated. The optimal component ratio of solvent providing the complete ABPBI dissolution is determined. Methanol containing dissolved KOH contributes to the creation of a single-phase superbasic medium, which accelerates and improves the polymer solubility in a mixture with DMSO, significantly reducing the viscoelasticity of the resulting solution. The optimum methanol content is up to 60 wt.% related to DMSO. The polymer dissolution rate increases by 5 times in this composition. It found the polymer concentration of 9% is close to the dissolution limit due to the strong solution structuring, which is probably associated with an increase in the amount of water released during the KOH-methanol-DMSO interactions. As a result, the conditions for obtaining high concentrated solutions in a complex, mainly organic solvent for fiber spinning are developed. The viscoelastic properties of solutions are measured in the concentration range of 1-9% at temperatures of 20-50 °C. The flow activation energy for 7 and 9% solutions decreases by 1.5 and 2.3 times, respectively, as the content of methanol in the complex solvent increases from 10 to 60%. |
| References: | J Colloid Interface Sci. 2009 Aug 1;336(1):360-7. (PMID: 19406425); Polymers (Basel). 2020 Apr 04;12(4):. (PMID: 32260347); Polymers (Basel). 2020 Oct 23;12(11):. (PMID: 33114143); Materials (Basel). 2022 Jan 21;15(3):. (PMID: 35160753) |
| Grant Information: | 17-79-30108 Russian Foundation for Basic Research |
| Contributed Indexing: | Keywords: ABPBI; Poly(2,5(6)-benzimidazole; complex superbasic medium solvents; polymer dopes for spinning; rheology; solubility |
| Entry Date(s): | Date Created: 20221111 Latest Revision: 20221117 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC9655549 |
| DOI: | 10.3390/polym14214648 |
| PMID: | 36365642 |
| Database: | MEDLINE |
Journal Article