Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization
The thermo- and pH-responsive polymer brushes based on methoxy[oligo(propyleneglycol)<sub>8</sub>-block-oligo(ethyleneglycol)<sub>8</sub>]methacrylate with different concentrations of N-[3-(dimethylamino)propyl]methacrylamide (from 0% to 20%) were synthesized via RAFT polymer...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/7/1641 |
| _version_ | 1797607189744975872 |
|---|---|
| author | Maria Simonova Denis Kamorin Alexander Filippov Oleg Kazantsev |
| author_facet | Maria Simonova Denis Kamorin Alexander Filippov Oleg Kazantsev |
| author_sort | Maria Simonova |
| collection | DOAJ |
| description | The thermo- and pH-responsive polymer brushes based on methoxy[oligo(propyleneglycol)<sub>8</sub>-block-oligo(ethyleneglycol)<sub>8</sub>]methacrylate with different concentrations of N-[3-(dimethylamino)propyl]methacrylamide (from 0% to 20%) were synthesized via RAFT polymerization. The “grafting-through” approach was used to prepare the low-molar-mass dispersion samples (<i>M</i><sub>w</sub>/<i>M</i><sub>n</sub> ≈ 1.3). Molar masses and hydrodynamic characteristics were obtained using static and dynamic light scattering and viscometry. The solvents used were acetonitrile, DMFA, and water. The molar masses of the prepared samples ranged from 40,000 to 60,000 g·mol<sup>–1</sup>. The macromolecules of these polymer brushes were modeled using a prolate revolution ellipsoid or a cylinder with spherical ends. In water, micelle-like aggregates were formed. Critical micelle concentrations decreased with the content of N-[3-(dimethylamino)propyl]methacrylamide. Molecular brushes demonstrated thermo- and pH-responsiveness in water–salt solutions. It was shown that at a given molecular mass and at close pH values, the increase in the number of N-[3-(dimethylamino)propyl]methacrylamide units led to an increase in phase separation temperatures. |
| first_indexed | 2024-03-11T05:26:43Z |
| format | Article |
| id | doaj.art-6186d8e9d6524a68afa4ba4b71e98bae |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T05:26:43Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-6186d8e9d6524a68afa4ba4b71e98bae2023-11-17T17:25:21ZengMDPI AGPolymers2073-43602023-03-01157164110.3390/polym15071641Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT PolymerizationMaria Simonova0Denis Kamorin1Alexander Filippov2Oleg Kazantsev3Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy Prospekt 31, 199004 Saint Petersburg, RussiaResearch Laboratory “New Polymeric Materials”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy Prospekt 31, 199004 Saint Petersburg, RussiaResearch Laboratory “New Polymeric Materials”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, RussiaThe thermo- and pH-responsive polymer brushes based on methoxy[oligo(propyleneglycol)<sub>8</sub>-block-oligo(ethyleneglycol)<sub>8</sub>]methacrylate with different concentrations of N-[3-(dimethylamino)propyl]methacrylamide (from 0% to 20%) were synthesized via RAFT polymerization. The “grafting-through” approach was used to prepare the low-molar-mass dispersion samples (<i>M</i><sub>w</sub>/<i>M</i><sub>n</sub> ≈ 1.3). Molar masses and hydrodynamic characteristics were obtained using static and dynamic light scattering and viscometry. The solvents used were acetonitrile, DMFA, and water. The molar masses of the prepared samples ranged from 40,000 to 60,000 g·mol<sup>–1</sup>. The macromolecules of these polymer brushes were modeled using a prolate revolution ellipsoid or a cylinder with spherical ends. In water, micelle-like aggregates were formed. Critical micelle concentrations decreased with the content of N-[3-(dimethylamino)propyl]methacrylamide. Molecular brushes demonstrated thermo- and pH-responsiveness in water–salt solutions. It was shown that at a given molecular mass and at close pH values, the increase in the number of N-[3-(dimethylamino)propyl]methacrylamide units led to an increase in phase separation temperatures.https://www.mdpi.com/2073-4360/15/7/1641synthesisRAFT polymerizationdilute solutionstatic and dynamic light scatteringpolymer brushesmacromolecular conformation |
| spellingShingle | Maria Simonova Denis Kamorin Alexander Filippov Oleg Kazantsev Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization Polymers synthesis RAFT polymerization dilute solution static and dynamic light scattering polymer brushes macromolecular conformation |
| title | Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization |
| title_full | Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization |
| title_fullStr | Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization |
| title_full_unstemmed | Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization |
| title_short | Synthesis, Characterization, Conformation in Solution, and Thermoresponsiveness of Polymer Brushes of methoxy[oligo (propylene glycol)-block-oligo(ethylene glycol)]methacrylate and N-[3-(dimethylamino)propyl]methacrylamide Obtained via RAFT Polymerization |
| title_sort | synthesis characterization conformation in solution and thermoresponsiveness of polymer brushes of methoxy oligo propylene glycol block oligo ethylene glycol methacrylate and n 3 dimethylamino propyl methacrylamide obtained via raft polymerization |
| topic | synthesis RAFT polymerization dilute solution static and dynamic light scattering polymer brushes macromolecular conformation |
| url | https://www.mdpi.com/2073-4360/15/7/1641 |
| work_keys_str_mv | AT mariasimonova synthesischaracterizationconformationinsolutionandthermoresponsivenessofpolymerbrushesofmethoxyoligopropyleneglycolblockoligoethyleneglycolmethacrylateandn3dimethylaminopropylmethacrylamideobtainedviaraftpolymerization AT deniskamorin synthesischaracterizationconformationinsolutionandthermoresponsivenessofpolymerbrushesofmethoxyoligopropyleneglycolblockoligoethyleneglycolmethacrylateandn3dimethylaminopropylmethacrylamideobtainedviaraftpolymerization AT alexanderfilippov synthesischaracterizationconformationinsolutionandthermoresponsivenessofpolymerbrushesofmethoxyoligopropyleneglycolblockoligoethyleneglycolmethacrylateandn3dimethylaminopropylmethacrylamideobtainedviaraftpolymerization AT olegkazantsev synthesischaracterizationconformationinsolutionandthermoresponsivenessofpolymerbrushesofmethoxyoligopropyleneglycolblockoligoethyleneglycolmethacrylateandn3dimethylaminopropylmethacrylamideobtainedviaraftpolymerization |