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US 2024/0327322 A1Published application
Crosslinked Polymers with Tunable Coefficients of Thermal Expansion
AssigneeNational Technology & Engineering Solutions of Sandia, LLC
InventorsErica Marie Redline, Chad Staiger, Jeffrey C. Foster, Jason Wade Dugger, Zachariah Page, Meghan Kiker, Aaron Scarlett
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Abstract
The invention describes a method to synthesize a divinyl- and diepoxy-substituted dibenzocyclooctanes, thereby providing a curative that can undergo a twist-boat to chair isomerization at elevated temperatures. The synthetic approach can be applied to a variety of thermosetting resins that can be crosslinked with the curative to form a polymer having a tunable coefficient of thermal expansion.
Claims5
A method to synthesize a substituted dibenzocyclooctane, comprising:
- providing a dibenzosuberone;
- diiodinating the phenyl rings of the dibenzosuberone to produce a diiodo-dibenzosuberone;
- olefinating the ketone of the diiodo-substituted dibenzosuberone to produce a diiodo-methylene-benzocycloheptane;
- ring expanding the diiodo-methylene-benzocycloheptane to produce a diiodo-substituted dibenzocyclooctanone;
- reducing the ketone of the diiodo-substituted dibenzocyclooctanone using a triethylsilane/trifluoroacetic acid mixture to produce a diiodo-substituted dibenzocyclooctane;
- converting the iodo substituents of the diiodo-substituted dibenzocyclooctane to vinyl groups to produce a divinyl-substituted dibenzocyclooctane.
3 more elements
Dependencies are inferred from the claim text.