Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids
Star-shaped six-arm poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline with hexaaza [2<sub>6</sub>]orthoparacyclophane derivative core were synthesized successfully using cationic ring-opening polymerization. Conformational behavior of prepared polymer stars were investigated by the met...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/4/800 |
| _version_ | 1797571544001544192 |
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| author | Tatyana Kirila Anna Smirnova Alla Razina Andrey Tenkovtsev Alexander Filippov |
| author_facet | Tatyana Kirila Anna Smirnova Alla Razina Andrey Tenkovtsev Alexander Filippov |
| author_sort | Tatyana Kirila |
| collection | DOAJ |
| description | Star-shaped six-arm poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline with hexaaza [2<sub>6</sub>]orthoparacyclophane derivative core were synthesized successfully using cationic ring-opening polymerization. Conformational behavior of prepared polymer stars were investigated by the methods of molecular hydrodynamics and optics in molecular dispersed solutions. It was shown that conformation characteristics of star-shaped polypeptoids depends on arm length, while the chemical structure weakly affects the behavior of the studied polymers in solutions. This behavior is caused by the close equilibrium rigidity of arms. The star-shaped polypeptoids have relatively high intramolecular density. All synthesized stars exhibit LCST behavior. Phase separation temperature depends on arm structure. It is lower for poly-2-alkyl-2-oxazines, monomer units of which contains one methylene group more than monomers of poly-2-alkyl-2-oxazoline. |
| first_indexed | 2024-03-10T20:41:50Z |
| format | Article |
| id | doaj.art-493e918dcf1e4258ae49438297daa347 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T20:41:50Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-493e918dcf1e4258ae49438297daa3472023-11-19T20:35:44ZengMDPI AGPolymers2073-43602020-04-0112480010.3390/polym12040800Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm PolypeptoidsTatyana Kirila0Anna Smirnova1Alla Razina2Andrey Tenkovtsev3Alexander Filippov4Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, 199004 Saint Petersburg, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, 199004 Saint Petersburg, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, 199004 Saint Petersburg, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, 199004 Saint Petersburg, RussiaInstitute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, 199004 Saint Petersburg, RussiaStar-shaped six-arm poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline with hexaaza [2<sub>6</sub>]orthoparacyclophane derivative core were synthesized successfully using cationic ring-opening polymerization. Conformational behavior of prepared polymer stars were investigated by the methods of molecular hydrodynamics and optics in molecular dispersed solutions. It was shown that conformation characteristics of star-shaped polypeptoids depends on arm length, while the chemical structure weakly affects the behavior of the studied polymers in solutions. This behavior is caused by the close equilibrium rigidity of arms. The star-shaped polypeptoids have relatively high intramolecular density. All synthesized stars exhibit LCST behavior. Phase separation temperature depends on arm structure. It is lower for poly-2-alkyl-2-oxazines, monomer units of which contains one methylene group more than monomers of poly-2-alkyl-2-oxazoline.https://www.mdpi.com/2073-4360/12/4/800star-shaped polypeptoidspoly-2-alkyl-2-oxazines and poly-2-alkyl-2-oxazolinessynthesizemolecular hydrodynamics and opticsconformational and hydrodynamic characteristicsthermosensitivity |
| spellingShingle | Tatyana Kirila Anna Smirnova Alla Razina Andrey Tenkovtsev Alexander Filippov Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids Polymers star-shaped polypeptoids poly-2-alkyl-2-oxazines and poly-2-alkyl-2-oxazolines synthesize molecular hydrodynamics and optics conformational and hydrodynamic characteristics thermosensitivity |
| title | Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids |
| title_full | Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids |
| title_fullStr | Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids |
| title_full_unstemmed | Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids |
| title_short | Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids |
| title_sort | synthesis and conformational characteristics of thermosensitive star shaped six arm polypeptoids |
| topic | star-shaped polypeptoids poly-2-alkyl-2-oxazines and poly-2-alkyl-2-oxazolines synthesize molecular hydrodynamics and optics conformational and hydrodynamic characteristics thermosensitivity |
| url | https://www.mdpi.com/2073-4360/12/4/800 |
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