Non-Coagulant Spinning of High-Strength Fibers from Homopolymer Polyacrylonitrile Synthesized via Anionic Polymerisation.
| Title: | Non-Coagulant Spinning of High-Strength Fibers from Homopolymer Polyacrylonitrile Synthesized via Anionic Polymerisation. |
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| Authors: | Skvortsov IY; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia.; Kuzin MS; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia.; Gerasimenko PS; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia.; Mironova MV; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia.; Golubev YV; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia.; Kulichikhin VG; A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, 119991 Moscow, Russia. |
| Source: | Polymers [Polymers (Basel)] 2024 Apr 23; Vol. 16 (9). Date of Electronic Publication: 2024 Apr 23. |
| 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: | The rheological properties, spinnability, and thermal-oxidative stabilization of high-molecular-weight linear polyacrylonitrile (PAN) homopolymers (molecular weights Mη = 90-500 kg/mol), synthesized via a novel metal-free anionic polymerization method, were investigated to reduce coagulant use, enable solvent recycling, and increase the carbon yield of the resulting carbon fibers. This approach enabled the application of the mechanotropic (non-coagulating) spinning method for homopolymer PAN solutions in a wide range of molecular weights and demonstrated the possibility of achieving a high degree of fiber orientation and reasonable mechanical properties. Rheological analysis revealed a significant increase in solution elasticity (G') with increasing molecular weight, facilitating the choice of optimal deformation rates for effective chain stretching prior to strain-induced phase separation during the eco-friendly spinning of concentrated solutions without using coagulation baths. The possibility of collecting ~80 wt% of the solvent at the first stage of spinning from the as-spun fibers was shown. Transparent, defect-free fibers with a tensile strength of up to 800 MPa and elongation at break of about 20% were spun. Thermal treatment up to 1500 °C yielded carbon fibers with a carbon residue of ~50 wt%, in contrast to ~35 wt% for industrial radically polymerized PAN carbonized under the same conditions. |
| References: | Materials (Basel). 2022 Dec 22;16(1):. (PMID: 36614445); ACS Macro Lett. 2015 Feb 17;4(2):192-196. (PMID: 35596430); Materials (Basel). 2020 Aug 05;13(16):. (PMID: 32764383); Polymers (Basel). 2018 Aug 02;10(8):. (PMID: 30960781); Polymers (Basel). 2022 Jan 29;14(3):. (PMID: 35160544) |
| Grant Information: | 1 United States CX CSRD VA |
| Contributed Indexing: | Keywords: anionic polymerization; coagulant-free spinning; fibers; homopolymer; mechanotropic spinning; polyacrylonitrile; rheology; thermo oxidative stabilization; thermolysis |
| Entry Date(s): | Date Created: 20240511 Latest Revision: 20240514 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC11085752 |
| DOI: | 10.3390/polym16091185 |
| PMID: | 38732654 |
| Database: | MEDLINE |
Journal Article