Compositions Based on PAN Solutions Containing Polydimethylsiloxane Additives: Morphology, Rheology, and Fiber Spinning.
| Title: | Compositions Based on PAN Solutions Containing Polydimethylsiloxane Additives: Morphology, Rheology, and Fiber Spinning. |
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| Authors: | Kulichikhin VG; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences 29, Leninsky prospect, Moscow 119991, Russia.; Skvortsov IY; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences 29, Leninsky prospect, Moscow 119991, Russia.; Varfolomeeva LA; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences 29, Leninsky prospect, Moscow 119991, Russia. |
| Source: | Polymers [Polymers (Basel)] 2020 Apr 04; Vol. 12 (4). Date of Electronic Publication: 2020 Apr 04. |
| 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 additives of polydimethylsiloxanes (PDMS) with various molecular weights on the morphology and rheological behavior of polyacrylonitrile (PAN) solutions in dimethyl sulfoxide has been analyzed. It was shown that only partial compatibility of the PDMS with the lowest molecular weight member of the homologous series studied-hexamethyldisiloxane-with PAN solution takes place. All other PDMS samples form emulsions with PAN solutions. The coalescence rate of PDMS drops depends on the viscosity ratio of the disperse phase and the continuous medium, which determines both the duration of dispersion preparation and the conditions for processing emulsions into fibers and films. An anomalous change in viscosity for a series of emulsions with different concentrations of additives, associated with the slippage, was detected. The relaxation properties of emulsions "feel" macro-phase separation. Modeling of the wet spinning process has shown that the morphology of the deposited solution drop reflects the movement of the diffusion front, leading to the gathering droplets in the center of the deposited formulation drop or to their localization in a certain arrangement. It was shown that the emulsion jets upon stretching undergo phase separation. |
| References: | J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Jan 15;1073:43-50. (PMID: 29232610); Biomacromolecules. 2009 Dec 14;10(12):3335-40. (PMID: 19924999); ACS Appl Mater Interfaces. 2016 Oct 12;8(40):27218-27226. (PMID: 27661093); Polymers (Basel). 2018 Aug 02;10(8):. (PMID: 30960781); J Colloid Interface Sci. 2018 Jan 15;510:12-19. (PMID: 28926724) |
| Grant Information: | 17-79-30108 Russian Science Foundation |
| Contributed Indexing: | Keywords: emulsion; fiber spinning; polyacrylonitrile; polyorganosiloxanes; rheology; solution |
| Entry Date(s): | Date Created: 20200409 Latest Revision: 20200928 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC7240589 |
| DOI: | 10.3390/polym12040815 |
| PMID: | 32260347 |
| Database: | MEDLINE |
Journal Article