Effect of Solvent Polarity on the Photo-Induced Polymerization-Induced Self-Assembly of Poly(tert -butyl acrylate)- block -Polystyrene near Room Temperature.
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| Title: | Effect of Solvent Polarity on the Photo-Induced Polymerization-Induced Self-Assembly of Poly(tert -butyl acrylate)- block -Polystyrene near Room Temperature. |
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| Authors: | Zhou, Tianyi1 (AUTHOR), Song, Jiawei1 (AUTHOR), Guerin, Gerald1 (AUTHOR) gguerin@ecust.edu.cn |
| Source: | Polymers (20734360). Jan2026, Vol. 18 Issue 2, p165. 17p. |
| Subjects: | Polar solvents, Molecular self-assembly, Polystyrene, Polymeric nanocomposites, Photopolymerization, Polyacrylates, Addition polymerization, Morphology |
| Abstract: | Reversible addition-fragmentation chain transfer mediated polymerization-induced self-assembly (RAFT-PISA) offers an efficient approach for the preparation of polymeric nanomaterials, giving access not only to common structures such as spheres, worm-like micelles and vesicles, but also to much more complex meso-objects. However, when the core forming block polymer possesses a high glass transition temperature (Tg), like poly(methyl methacrylate) or polystyrene (PS), high-order morphologies are particularly difficult to achieve since the glassy core can prevent polymer chain reorganization during PISA. To overcome this issue, we chose to perform visible light-initiated RAFT-PISA of poly(tert-butyl acrylate)-block-polystyrene (PtBA-b-PS) in solvent systems with varying degrees of polarity. More specifically, we prepared different mixtures of diisopropyl ether and ethanol and chose PtBA as macro-CTA due to its broad range of solubility. By varying the ratio between ethanol and diisopropyl ether, we could observe a transition from spherical micelles to vesicles via intermediate structures (e.g., necklace-like micelles, network-like micellar aggregates and wedding rings). This result was particularly remarkable since the experiments were performed near room temperature. We believe that these multiple morphologies were induced by the interactions between the solvent and the corona and the change in swelling of the polystyrene core with styrene monomer that facilitated its rearrangement. We anticipate that this approach could be applied to other polymeric systems with high Tgs. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 191214572 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effect of Solvent Polarity on the Photo-Induced Polymerization-Induced Self-Assembly of Poly(tert -butyl acrylate)- block -Polystyrene near Room Temperature. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Tianyi%22">Zhou, Tianyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Jiawei%22">Song, Jiawei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guerin%2C+Gerald%22">Guerin, Gerald</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gguerin@ecust.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jan2026, Vol. 18 Issue 2, p165. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polar+solvents%22">Polar solvents</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Polystyrene%22">Polystyrene</searchLink><br /><searchLink fieldCode="DE" term="%22Polymeric+nanocomposites%22">Polymeric nanocomposites</searchLink><br /><searchLink fieldCode="DE" term="%22Photopolymerization%22">Photopolymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Polyacrylates%22">Polyacrylates</searchLink><br /><searchLink fieldCode="DE" term="%22Addition+polymerization%22">Addition polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Morphology%22">Morphology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Reversible addition-fragmentation chain transfer mediated polymerization-induced self-assembly (RAFT-PISA) offers an efficient approach for the preparation of polymeric nanomaterials, giving access not only to common structures such as spheres, worm-like micelles and vesicles, but also to much more complex meso-objects. However, when the core forming block polymer possesses a high glass transition temperature (Tg), like poly(methyl methacrylate) or polystyrene (PS), high-order morphologies are particularly difficult to achieve since the glassy core can prevent polymer chain reorganization during PISA. To overcome this issue, we chose to perform visible light-initiated RAFT-PISA of poly(tert-butyl acrylate)-block-polystyrene (PtBA-b-PS) in solvent systems with varying degrees of polarity. More specifically, we prepared different mixtures of diisopropyl ether and ethanol and chose PtBA as macro-CTA due to its broad range of solubility. By varying the ratio between ethanol and diisopropyl ether, we could observe a transition from spherical micelles to vesicles via intermediate structures (e.g., necklace-like micelles, network-like micellar aggregates and wedding rings). This result was particularly remarkable since the experiments were performed near room temperature. We believe that these multiple morphologies were induced by the interactions between the solvent and the corona and the change in swelling of the polystyrene core with styrene monomer that facilitated its rearrangement. We anticipate that this approach could be applied to other polymeric systems with high Tgs. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym18020165 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 165 Subjects: – SubjectFull: Polar solvents Type: general – SubjectFull: Molecular self-assembly Type: general – SubjectFull: Polystyrene Type: general – SubjectFull: Polymeric nanocomposites Type: general – SubjectFull: Photopolymerization Type: general – SubjectFull: Polyacrylates Type: general – SubjectFull: Addition polymerization Type: general – SubjectFull: Morphology Type: general Titles: – TitleFull: Effect of Solvent Polarity on the Photo-Induced Polymerization-Induced Self-Assembly of Poly(tert -butyl acrylate)- block -Polystyrene near Room Temperature. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhou, Tianyi – PersonEntity: Name: NameFull: Song, Jiawei – PersonEntity: Name: NameFull: Guerin, Gerald IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 2 Titles: – TitleFull: Polymers (20734360) Type: main |
| ResultId | 1 |
