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AssigneeThe University of Akron
InventorsMatthew L. Becker, Andrew P. Dove, Vinh X. Truong, Craig A. Bell, Ian A. Barker, Jiayi Yu
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In various embodiments, the present invention provides a strong, synthetic elastomer materials (and related methods for making same) with mechanical properties that are controlled by the stereochemically-defined double bonds within their backbone, yet have physical properties that are derived from monomer selection and defined, modifiable, chain end groups. The use of the organocatalyzed, stereospecific addition of thiols to activated alkynes, affords isolated high molar mass materials (>100 kDa) via step-growth polymerization with high levels of cis- or trans-double bond content. Furthermore, in various aspects of the present invention, it has been found that changing the monomer composition and chain end groups provides additional control over the materials' physical properties to provide more efficient compounding with polar additives. Using this approach to elastomer synthesis, further end group modification and toughening through various vulcanization strategies are also possible.
A thiol-yne elastomer composition comprising the residue of a multi-functional alkyne monomer and the residue of a multi-functional thiol monomer, said thiol-yne elastomer composition having a cis-trans double bond ratio of from 99:1 to about 1:99 having a glass transition temperature (Tg) of from about −50° C. or more to about 10° C. or less.
A thiol-yne elastomer composition comprising the residue of a multi-functional alkyne monomer and the residue of a multi-functional thiol monomer, said thiol-yne elastomer composition having a cis-trans double bond ratio of from 99:1 to about 1:99 having an elastic modulus (E) of from about 1.0 MPa to about 90 MPa.
A thiol-yne elastomer composition comprising the residue of a multi-functional alkyne monomer and the residue of a multi-functional thiol monomer, said thiol-yne elastomer composition having a cis-trans double bond ratio of from 99:1 to about 1:99 having an elongation at break (εbreak) of from 50% or more to 3000% or less.
A thiol-yne elastomer composition comprising the residue of a multi-functional alkyne monomer and the residue of a multi-functional thiol monomer, said thiol-yne elastomer composition having a cis-trans double bond ratio of from 99:1 to about 1:99 and a glass transition temperature (Tg) of from about −50° C. or more to about 10° C. or less wherein said multi-functional alkyne is a dialkyne having the formula:
Dependencies are inferred from the claim text.