Amphiphilic poly(ether urethanes) carrying associative terpyridine side groups with controlled spacing
Amphiphilic poly(ether urethanes) carrying associative terpyridine side groups with controlled spacing
复制标题
带有间距可控的缔合三联吡啶侧基的两亲性聚(醚型聚氨酯)
DOI:
10.1039/d1py00121c
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发表时间:
2021
影响因子:
4.6
通讯作者:
S. Seiffert
中科院分区:
文献类型:
--
作者:
K. Breul;S. Seiffert
The rational design of transiently crosslinked polymer gels requires a profound understanding of how molecular and topological factors determine the mechanical and dynamic material properties. To refine so-far established structure–property relations, complementary and versatile model sytems are still a crucial prerequisiste. In this study, the synthesis of a metallo-supramolecular associating terpyridine-diol (referred to as sticker) and its incorporation into poly(ethylene glycol) (pEG) based polyurethanes (PU) with strictly alternating vs. random sequences and variable sticker spacings is described. Synergetic effects resulting from the proximity of multiple neighboring urethane and sticker units in the random PUs are reflected in the hydrogen-bonding characteristics in the melt state as well as in their solution behavior. While the alternating PUs form micellar aggregates in water, whose size strongly depends on concentration and temperature leading to a pEG-length-dependent thermo-responsiveness, the random PUs are water insoluble. Finally, shear rheological measurements performed on manganese(II)-crosslinked PU gels demonstrate severely prolonged network relaxation times and an exacerbated shallowing of the power-lawscaling in the terminal flow regime in case of the random PUs.
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影响因子:
1.1
作者:
Karpov, S. V.;Lodygina, V. P.;Badamshina, E. R.
通讯作者:
Badamshina, E. R.
影响因子:
1.8
作者:
J. Hovinen
通讯作者:
J. Hovinen
影响因子:
9.9
作者:
Branca, Caterina;D'Angelo, Giovanna
通讯作者:
D'Angelo, Giovanna
影响因子:
2.5
作者:
Irusta, L;Iruin, JJ;Coleman, MM
通讯作者:
Coleman, MM
DOI:
10.1002/anie.201700628
发表时间:
2017-04-03
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Liu Y;Meng H;Qian Z;Fan N;Choi W;Zhao F;Lee BP
通讯作者:
Lee BP