Ut-battelle, Inc.

Md Anisur Rahman

Tomonori Saito

Zhengping Zhou

Sungjin Kim

A crosslinked polymeric composition comprising a base polymer containing unconjugated carbon-carbon double bonds of the formula —CR═CR—, wherein a portion of said unconjugated carbon-carbon double bonds in said base polymer are interconnected by a crosslinker (L) as shown in the following structure: wherein: Rand Rare independently selected from hydrogen atom and hydrocarbon groups, wherein Rand Rmay optionally interconnect to form a ring; x represents the molar percentage of segments that are linked with the linker L throughout the crosslinked polymeric composition; L is a crosslinker having the formula: —S—R-L-R-L-R—S—; Rand Rare independently selected from hydrocarbon linking groups containing at least one carbon atom; Land Lindependently represent dynamic reversible crosslinking groups; and Zand Zindependently represent remaining portions of the base polymer.

Crosslinked polymeric composition and its use in additive manufacturing

A crosslinked polymeric composition comprising A, B, C, D, and E units having the following structures, respectively: and wherein dashed bonds represent optional bonds; the asterisks (*) in C units represent covalent bond connection points with asterisks in A units and E units; the asterisks (*) in D units represent covalent bond connection points with asterisks in B units and E units; wherein a portion of E units are bound to C units, a portion of E units are bound to D units, and a portion of E units are bound to both C and D units; and the composition contains a multiplicity of A, B, C, D, and E units. Also described is a method for producing the crosslinked polymeric composition by reacting epoxy-containing molecules (A molecules), isocyanate-containing molecules (B molecules), and disulfide-containing molecules (C molecules).

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Knoxville, TN, United States of America

Md Anisur Rahman