Solubility, Rheology, and Coagulation Kinetics of Poly-(O-Aminophenylene)Naphthoylenimide Solutions.
| Title: | Solubility, Rheology, and Coagulation Kinetics of Poly-(O-Aminophenylene)Naphthoylenimide Solutions. |
|---|---|
| Authors: | Skvortsov IY; A.V. Topichiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Av., 119991 Moscow, Russia.; Kulichikhin VG; A.V. Topichiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Av., 119991 Moscow, Russia.; Ponomarev II; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russia.; Varfolomeeva LA; A.V. Topichiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Av., 119991 Moscow, Russia.; Kuzin MS; A.V. Topichiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Av., 119991 Moscow, Russia.; Skupov KM; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russia.; Volkova YA; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russia.; Razorenov DY; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russia.; Serenko OA; A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russia. |
| Source: | Polymers [Polymers (Basel)] 2020 Oct 23; Vol. 12 (11). Date of Electronic Publication: 2020 Oct 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 effect of temperature and storage time at a constant temperature on the stability of poly-(o-aminophenylene)naphthoylenimide solutions in N-methylpyrrolidone has been analyzed using rotational rheometry. A temperature-time window beyond which an irreversible change in the viscoelastic properties of solutions due to cumulative reactions of continuous polymerization and possible intramolecular cyclization has been detected. The influence of polymer concentration and its molecular weight on the rheological properties of solutions determining the choice of methods for their processing into fibers and films has been investigated. The effect of non-solvents (water and ethanol) additives on the rheological properties of solutions and the kinetics of their coagulation has been studied. Dosed addition of non-solvent into the solution promotes a significant increase in the viscoelasticity up to gelation and phase separation. Non-solvent presence in the polymer solutions reduces the activity of the solvent, accelerates the movement of the diffusion front at coagulation, and minimizes the number of macro defects. The combination of parameters under investigation renders it possible for the first time to develop new principles modifying dopes for wet spinning into aqueous or ethanol coagulation bath and finally to obtain a heat- and fire-resistant polynaphthoylenebenzimidazole fibers. |
| References: | Polymers (Basel). 2018 Aug 02;10(8):. (PMID: 30960781); Materials (Basel). 2019 Oct 25;12(21):. (PMID: 31731389); Materials (Basel). 2020 Aug 05;13(16):. (PMID: 32764383); Materials (Basel). 2020 Aug 07;13(16):. (PMID: 32784713) |
| Grant Information: | 18-29-17062 mk Russian Foundation for Basic Research; 1 United States CX CSRD VA |
| Contributed Indexing: | Keywords: coagulation; heat resistance fibers; heterocyclic polymer; ladder polymers; poly-(o-aminophenylene)naphthoylenimide precursor; polymer solution rheology; polynaphthoylenebenzimidazole (PNBI); rheology; solution modification; spinning solution |
| Entry Date(s): | Date Created: 20201029 Latest Revision: 20201127 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC7690823 |
| DOI: | 10.3390/polym12112454 |
| PMID: | 33114143 |
| Database: | MEDLINE |
Journal Article