Heterogeneity, Segmental and Hydrogen Bond Dynamics, and Aging of Supramolecular Self-Healing Rubber
Heterogeneity, Segmental and Hydrogen Bond Dynamics, and Aging of Supramolecular Self-Healing Rubber
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超分子自修复橡胶的异质性、链段和氢键动力学以及老化
DOI:
10.1021/ma400019m
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发表时间:
2013-02
期刊:
影响因子:
5.5
通讯作者:
Kay Saalwächter
中科院分区:
文献类型:
--
作者:
Baohui Li;Filipe Furtado;Pingchuan Sun;Kay Saalwächter
In recent years, self-healing materials have attracted increasing attention due to their potentially spontaneous self-repairing ability after mechanical damage. Here, we focus on a supramolecular self-healing rubber based on fatty acids following the work of Leibler and co-workers. We study the heterogeneous network structure and hydrogen bond dynamics as well as its significant aging properties using several experimental techniques. NMR experiments reveal that the rubber is basically a two-component system, with a ∼85% fraction of material rich in hydrogen-bonded structures and associated aliphatic moieties, undergoing a glass transition just below ambient temperature, and the other one being comprised of more mobile aliphatic chains. Changes in the IR bands corresponding to the NH bending and CO stretching vibrations show that water in the rubber not only takes the role of a plasticizer, reducing the glass transition temperature of the main component, but also is involved in changes of the hydrogen-bond...
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影响因子:
5.5
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通讯作者:
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影响因子:
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影响因子:
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通讯作者:
Blümich, B