open access

https://hdl.handle.net/2115/92776

Rotaxane Formation of Multicyclic Polydimethylsiloxane in a Silicone Network: A Step toward Constructing "Macro-Rotaxanes" from High-Molecular-Weight Axle and Wheel Components

英語

Topological Trapping

2023-08-28

Wiley-Blackwell

Angewandte chemie-international edition

62(35)

e202304493

Rotaxanes consisting of a high-molecular-weight axle and wheel components (macro-rotaxanes) have high structural freedom, and are attractive for soft-material applications. However, their synthesis remains underexplored. Here, we investigated macro-rotaxane formation by the topological trapping of multicyclic polydimethylsiloxanes (mc-PDMSs) in silicone networks. mc-PDMS with different numbers of cyclic units and ring sizes was synthesized by cyclopolymerization of a & alpha;,& omega;-norbornenyl-functionalized PDMS. Silicone networks were prepared in the presence of 10-60 wt % mc-PDMS, and the trapping efficiency of mc-PDMS was determined. In contrast to monocyclic PDMS, mc-PDMSs with more cyclic units and larger ring sizes can be quantitatively trapped in the network as macro-rotaxanes. The damping performance of a 60 wt % mc-PDMS-blended silicone network was evaluated, revealing a higher tan & delta; value than the bare PDMS network. Thus, macro-rotaxanes are promising as non-leaching additives for network polymers.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Ebe, M., Soga, A., Fujiwara, K., Ree, B. J., Marubayashi, H., Hagita, K., Imasaki, A., Baba, M., Yamamoto, T., Tajima, K., Deguchi, T., Jinnai, H., Isono, T., Satoh, T., Angew. Chem. Int. Ed. 2023, 62, e202304493, which has been published in final form at https://doi.org/10.1002/anie.202304493. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

1433-7851

1521-3773