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首页> 外文期刊>Journal of Applied Polymer Science >Amine-functionalized metal-organic frameworks/epoxy nanocomposites: Structure-properties relationships
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Amine-functionalized metal-organic frameworks/epoxy nanocomposites: Structure-properties relationships

机译：Amine-functionalized metal-organic frameworks/epoxy nanocomposites: Structure-properties relationships

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摘要

Amine-functionalized MIL-101(Cr)-NH2 metal-organic frameworks (MOF-N)/epoxy nanocomposites with Excellent cure label and high thermal stability were developed. Structure-property relationship was discussed by comparison of the cure state, thermal and viscoelastic behavior of epoxy nanocomposites containing pristine MOF or MOF-N applying differential scanning calorimetry (DSC), thermogravimetric analysis, and dynamic mechanical analysis. Epoxy containing 0.3 wt MOF-N exhibited high glass transition temperature (T-g) of 96 degrees C compared with 85 degrees C observed for epoxy/MOF system. Thus, MOF-N played the role of catalyst in epoxy/amine curing reaction. Correspondingly, a lower activation energy was obtained based on cure kinetics modeling based on DSC measurements. Besides, incorporation of low amount (0.5 wt) MOF-N induced an early-state resistance against decomposition, featured by 11 degrees C rise in decomposition temperature at 5 weight loss. This was ascribed to the formation of porous metallic oxides during thermal decomposition of MOF-N in the epoxy system acting as a heat barrier, which increased the activation energy of decomposition. Amine-functionalization considerably prevented from further oxidation of the inner part of the matrix.

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