Jones, Brad H.; Staiger, Chad; Powers, Jackson; Herman, Jeremy A.; Roman-Kustas, Jessica published the artcile< Selectively Depolymerizable Polyurethanes from Unsaturated Polyols Cleavable by Olefin Metathesis>, COA of Formula: C4H8O, the main research area is selectively depolymerizable polyurethane unsaturated polyol cleavable olefin metathesis; cycloalkenes; depolymerization; olefin metathesis; polyurethanes; ring-closing metathesis.
This communication describes a novel series of linear and crosslinked polyurethanes (PUs) and their selective depolymerization under mild conditions. Two unique polyols are synthesized bearing unsaturated units in a configuration designed to favor ring-closing metathesis (RCM) to five- and six-membered cycloalkenes. These polyols are co-polymerized with toluene diisocyanate to generate linear PUs and trifunctional hexamethylene- and diphenylmethane-based isocyanates to generate crosslinked PUs. The polyol design is such that the RCM reaction cleaves the backbone of the polymer chain. Upon exposure to dilute solutions of Grubbs’ catalyst under ambient conditions, the PUs are rapidly depolymerized to low mol. weight, soluble products bearing vinyl and cycloalkene functionalities. These functionalities enable further re-polymerization by traditional strategies for polymerization of double bonds. It is anticipated that this general approach can be expanded to develop a range of chem. recyclable condensation polymers that are readily depolymerized by orthogonal metathesis chem.
Macromolecular Rapid Communications published new progress about Depolymerization. 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, COA of Formula: C4H8O.
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