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Multiarm Star-Shaped Polydimethylsiloxanes with a Dendritic Branching Center. Molecules 2021; 26:molecules26113280. [PMID: 34072317 PMCID: PMC8199136 DOI: 10.3390/molecules26113280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/25/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022] Open
Abstract
New multiarm stars have been synthesized based on polylithium derivatives of high-generation carbosilane dendrimers. In the synthesis of multiarm stars based on the eighth-generation dendrimer, steric hindrances were observed even during the synthesis of a polylithium initiator. Subsequently, this led to chain transfer reactions between growing arms, as well as other side effects. As a result, dense nanogel formations with a higher tendency of ordering than in classical objects of this type were isolated from the reaction mixture. The study of the rheology of multiarm stars based on sixth-generation dendrimers made it possible to determine the activation energies of viscous flow in these objects, which makes it possible to consider them as objects with a macromolecular nature and a reptation flow mechanism.
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Surapati M, Seino M, Hayakawa T, Kakimoto MA. Synthesis of hyperbranched-linear star block copolymers by atom transfer radical polymerization of styrene using hyperbranched poly(siloxysilane) (HBPS) macroinitiator. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2009.10.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abeysekera R, Bushby RJ, Caillet C, Hamley IW, Lozman OR, Lu Z, Robards AW. Discotic Liquid Crystalline Triblock Copolymers: Interplay of Liquid Crystal Architecture with Microphase Separation. Macromolecules 2003. [DOI: 10.1021/ma020748x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rukmal Abeysekera
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Richard J. Bushby
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Celine Caillet
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Ian W. Hamley
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Owen R. Lozman
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Zhibao Lu
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
| | - Anthony W. Robards
- The Centre for Self-Organising Molecular System, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK; and Institute for Applied Biology, Department of Biology, University of York, York YO10 5BQ, UK
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Zhao X, Hu X, Yue CY, Zhang H, Zhou Q. Synthesis and characterization of block copolymers containing PC segments and PHTH-6 mesogenic units. J Appl Polym Sci 2002. [DOI: 10.1002/app.10314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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