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

被引：6

作者：

Ebe, Minami ^{[2
]}

Soga, Asuka ^{[2
]}

Fujiwara, Kaiyu ^{[2
]}

Ree, Brian J. ^{[1
]}

Marubayashi, Hironori ^{[3
]}

Hagita, Katsumi ^{[4
]}

Imasaki, Atsushi ^{[3
]}

Baba, Miru

Yamamoto, Takuya ^{[1
]}

Tajima, Kenji ^{[1
]}

Deguchi, Tetsuo ^{[5
]}

Jinnai, Hiroshi ^{[3
]}

Isono, Takuya ^{[1
]}

Satoh, Toshifumi ^{[1
]}

机构：

[1] Hokkaido Univ, Fac Engn, Div Appl Chem, Sapporo 0608628, Japan

[2] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo 0608628, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan

[4] Natl Def Acad, Dept Appl Phys, Yokosuka 2398686, Japan

[5] Ochanomizu Univ, Fac Core Res, Dept Phys, Tokyo 1128610, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 35期

关键词：

Cyclic Polymers; Damping Performance; Macro-Rotaxane; Silicone Networks; Topological Trapping; POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE); LINEAR POLY(DIMETHYLSILOXANES); CYCLIC POLY(DIMETHYLSILOXANE); STRESS-RELAXATION; MODEL NETWORKS; CHAINS; CYCLOPOLYMERIZATION; CRYSTALLIZATION; FUNCTIONALITY; ELASTOMERS;

D O I：

10.1002/anie.202304493

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页数：11