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首页> 美国政府科技报告 >Thermoset Precursor to Monolithic Carbon Glass Prepared by the Pd/Cu-Catalyzed Alkynylation of Polyphenylenes.
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Thermoset Precursor to Monolithic Carbon Glass Prepared by the Pd/Cu-Catalyzed Alkynylation of Polyphenylenes.

机译：通过pd / Cu催化的聚亚苯基炔基化制备的热固性前体到整体式碳玻璃。

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摘要

The functionalization of (bromophenyl)oligophenylene with several alkynes is described. The bromide groups on the oligomer were replaced with terminal alkynes using a Pd/Cu catalysts system. Substitution of nearly all the original bromide locations was achieved. The functionalized oligomers, freely soluble in THF, exhibited high char yields on thermolysis to 900 deg C under a nitrogen atmosphere. Several of the functionalized oligomers flowed on heating. The oligomer that was functionalized with phenylacetylene exhibited a well-defined melting point at 190 deg C and acetylenic coupling did not take place until 310 deg C. The hot oligomer flowed to form a monolith of glassy carbon. Depending on the alkyne used, a range of densities from 1.39-1.95 g/cc could be obtained in the final carbon glass. The structure/property relationships and the material applications are discussed.

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