Tunable Self-Assembled Elastomers Using Triply Hydrogen-Bonded Arrays
Tunable Self-Assembled Elastomers Using Triply Hydrogen-Bonded Arrays
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DOI：
10.1021/ma3001109
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发表时间：
2012-06-12
期刊：
影响因子：
5.5
通讯作者：
Wilson, Andrew J.
中科院分区：
文献类型：
--
作者：
Gooch, Adam;Nedolisa, Chinemelum;Wilson, Andrew J.
本文介绍了聚氨酯弹性体的合成及其表面分子组装。新的酰胺基异胞嘧啶（AIC）和脲基咪唑（UIM）基序之间的三重氢键被用来促进组装的材料。该材料包含衍生自遥爪二醇的无定形相和包含超分子端基的硬结晶相。异源互补氢键相互作用的使用导致两个独特的特征：（1）弹性体的组装仅在两种组分存在下发生，以及（2）在合成期间使用的不同进料比允许随着在材料的非晶相和结晶相中发现的组分的化学计量变化而调整材料性质。因此，该方法提供了对材料性能的超分子控制，并导致材料可以熔融，因此与标准共价弹性体相比，可以在较低的温度下加工。
This article describes the synthesis and surpamolecular assembly of polyurethane-based elastomers. Triple hydrogen bonding between novel amidoisocytosine (AIC) and ureidoimidazole (UIM) motifs is used to promote assembly of the material. The material comprises an amorphous phase derived from a telechelic diol and a hard crystalline phase that comprises the supramolecular end groups. The use of a heterocomplementary hydrogen bonding interaction results in two unique features: (1) assembly of the elastomer occurs only in the presence of both components, and (2) different feed ratios used during synthesis allow the materials properties to be tuned as the stoichiometries of the components found in the amorphous and crystalline phases of the material are varied. The approach hence offers supramolecular control over materials properties and results in materials that can be melted and therefore processed at lower temperature compared to standard covalent elastomers.