Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains
Polymethacrylic molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains were investigated by static and dynamic light scattering and viscometry. The solvents used were acetonitrile, tetrahydrofuran, chloroform, and water. The grafted copolymers were molecularly disper...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/13/16/2715 |
| _version_ | 1797522282811228160 |
|---|---|
| author | Maria Simonova Denis Kamorin Oleg Kazantsev Maria Nepomnyashaya Alexander Filippov |
| author_facet | Maria Simonova Denis Kamorin Oleg Kazantsev Maria Nepomnyashaya Alexander Filippov |
| author_sort | Maria Simonova |
| collection | DOAJ |
| description | Polymethacrylic molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains were investigated by static and dynamic light scattering and viscometry. The solvents used were acetonitrile, tetrahydrofuran, chloroform, and water. The grafted copolymers were molecularly dispersed and dissolved in tetrahydrofuran and acetonitrile. In these solvents, the molar masses of copolymers were determined. In thermodynamically good solvents, namely tetrahydrofuran and acetonitrile, investigated copolymers have a high intramolecular density and the shape of their molecules resembles a star-shaped macromolecule. In chloroform and water, the micelle-like aggregates were formed. Critical micelle concentrations decreased with the lengthening of the hydrophobic block. Molecular brushes demonstrated thermosensitive behavior in aqueous solutions. The phase separation temperatures reduced with an increase in the content of the oligo(propylene glycol) block. |
| first_indexed | 2024-03-10T08:26:13Z |
| format | Article |
| id | doaj.art-4185e6dc5f064da58437af3bc498425b |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:26:13Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-4185e6dc5f064da58437af3bc498425b2023-11-22T09:23:16ZengMDPI AGPolymers2073-43602021-08-011316271510.3390/polym13162715Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side ChainsMaria Simonova0Denis Kamorin1Oleg Kazantsev2Maria Nepomnyashaya3Alexander Filippov4Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy Prospekt 31, 199004 Saint Petersburg, RussiaLaboratory of Acrylic Monomers and Polymers, Department of Chemical Technology, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, RussiaLaboratory of Acrylic Monomers and Polymers, Department of Chemical Technology, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, RussiaHigher School of Technology and Energy, Ivana Chernykh 4, 198095 Saint Petersburg, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy Prospekt 31, 199004 Saint Petersburg, RussiaPolymethacrylic molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains were investigated by static and dynamic light scattering and viscometry. The solvents used were acetonitrile, tetrahydrofuran, chloroform, and water. The grafted copolymers were molecularly dispersed and dissolved in tetrahydrofuran and acetonitrile. In these solvents, the molar masses of copolymers were determined. In thermodynamically good solvents, namely tetrahydrofuran and acetonitrile, investigated copolymers have a high intramolecular density and the shape of their molecules resembles a star-shaped macromolecule. In chloroform and water, the micelle-like aggregates were formed. Critical micelle concentrations decreased with the lengthening of the hydrophobic block. Molecular brushes demonstrated thermosensitive behavior in aqueous solutions. The phase separation temperatures reduced with an increase in the content of the oligo(propylene glycol) block.https://www.mdpi.com/2073-4360/13/16/2715molecular brushesradical polymerizationthermoresponsive polymersmethoxy (oligoethylene glycol-block-oligopropylene glycol) methacrylatesoligo(ethylene glycol) methacrylatesoligo(propylene glycol) methacrylates |
| spellingShingle | Maria Simonova Denis Kamorin Oleg Kazantsev Maria Nepomnyashaya Alexander Filippov Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains Polymers molecular brushes radical polymerization thermoresponsive polymers methoxy (oligoethylene glycol-block-oligopropylene glycol) methacrylates oligo(ethylene glycol) methacrylates oligo(propylene glycol) methacrylates |
| title | Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains |
| title_full | Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains |
| title_fullStr | Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains |
| title_full_unstemmed | Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains |
| title_short | Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains |
| title_sort | conformation self organization and thermoresponsibility of polymethacrylate molecular brushes with oligo ethylene glycol block oligo propylene glycol side chains |
| topic | molecular brushes radical polymerization thermoresponsive polymers methoxy (oligoethylene glycol-block-oligopropylene glycol) methacrylates oligo(ethylene glycol) methacrylates oligo(propylene glycol) methacrylates |
| url | https://www.mdpi.com/2073-4360/13/16/2715 |
| work_keys_str_mv | AT mariasimonova conformationselforganizationandthermoresponsibilityofpolymethacrylatemolecularbrusheswitholigoethyleneglycolblockoligopropyleneglycolsidechains AT deniskamorin conformationselforganizationandthermoresponsibilityofpolymethacrylatemolecularbrusheswitholigoethyleneglycolblockoligopropyleneglycolsidechains AT olegkazantsev conformationselforganizationandthermoresponsibilityofpolymethacrylatemolecularbrusheswitholigoethyleneglycolblockoligopropyleneglycolsidechains AT marianepomnyashaya conformationselforganizationandthermoresponsibilityofpolymethacrylatemolecularbrusheswitholigoethyleneglycolblockoligopropyleneglycolsidechains AT alexanderfilippov conformationselforganizationandthermoresponsibilityofpolymethacrylatemolecularbrusheswitholigoethyleneglycolblockoligopropyleneglycolsidechains |