Dynamisch‐kovalente Chemie

Tamke, Sergej; Paradies, Jan

doi:10.1002/nadc.201390278

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…As a consequence, the thermoset can be recycled to be a new polymer. Dynamic covalent bonds, , which are unique in the sense that they combine the characteristics of the covalent and noncovalent bonds, meet the above requirement. The dynamic covalent bonds, such as imine linkage, trithiocarbonate, acylhydrazone, disulfide, and Diels–Alder (DA) bonds, can reversibly form and break under certain conditions .…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Transformation of Epoxy–Amine Thermoset into Soluble and Reusable Polymers

et al. 2015

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The degradation and reuse of epoxy thermosets have significant impact on the environments. We report that an epoxy−amine thermoset embedded with Diels−Alder (DA) bonds was transformed into soluble polymers via sonochemistry under mild temperature (ca. 20 °C) for the first time. Sonication could effectively induce the position-oriented cleavage of DA bonds (i.e., retro-DA) of the fully swelled epoxy thermoset in dimethyl sulfoxide (DMSO), leading to the soluble polymers. Of importance, such sonochemical process could be regulated on demand via switching on-and-off of the sonication. The obtained soluble polymers could be recured to form epoxy−amine thermosets via DA reaction. This sonochemical method might provide an unprecedented and efficient way to the controlled degradation and recycling of the epoxy thermosets containing the dynamic covalent bonds likes DA groups.

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