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首页> 外文期刊>Chemistry: A European journal >Versatile supramolecular cross-linker: A rotaxane cross-linker that directly endows vinyl polymers with movable cross-links
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Versatile supramolecular cross-linker: A rotaxane cross-linker that directly endows vinyl polymers with movable cross-links

机译：多功能超分子交联剂：一种轮烷烷类交联剂，可直接赋予乙烯基聚合物以可移动的交联键

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摘要

A supramolecular cross-linked cross-linker, capable of introducing rotaxane cross-links to vinyl polymers, has been developed for the rational synthesis of polyrotaxane networks. The experimental results reveal that the combination of an oligocyclodextrin (OCD) and a terminal bulky group-tethering macromonomer (TBM) forms a polymer-network structure having polymerizable moieties through supramolecular cross-linking. Radical polymerization of a variety of typical vinyl monomers in the presence of the vinylic supramolecular cross-linker (VSC) afforded the corresponding vinyl polymers cross-linked through the rotaxane cross-links (RCP) as transparent stable films in high yields under both photoinitiated and thermal polymerization conditions. A poly(N,N- dimethylacrylamide)-based hydrogel synthesized by using VSC, RCP DMAAm, displayed a unique mechanical property. The small-angle X-ray scattering (SAXS) results, indicating patterns characteristic of a polyrotaxane network, clearly suggested the presence and role of the rotaxane cross-links. The confirmation of the introduction of rotaxane-cross-links into vinyl polymers strongly reveals the significant usefulness of VSC.
机译：为了合理合成聚轮烷网络，已经开发了一种超分子交联的交联剂，该交联剂能够将轮烷的交联引入乙烯基聚合物。实验结果表明，低聚环糊精（OCD）和末端庞大的基团拴系大分子单体（TBM）的组合通过超分子交联形成了具有可聚合部分的聚合物网络结构。在乙烯基超分子交联剂（VSC）的存在下，多种典型乙烯基单体的自由基聚合反应提供了通过轮烷交联剂（RCP）交联的相应乙烯基聚合物，透明透明的薄膜在光引发和光引发下均以高收率获得热聚合条件。通过使用VSC，RCP DMAAm合成的聚（N，N-二甲基丙烯酰胺）基水凝胶显示出独特的机械性能。小角度X射线散射（SAXS）结果表明了聚轮烷网络的特征模式，清楚地表明了轮烷交联的存在和作用。将轮烷烷交联引入乙烯基聚合物的证实强烈揭示了VSC的显着实用性。

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