United States of America As Represented by the Administrator of Nasa

Christopher J Wohl

Bryce L Horvath

Joseph G Smith, Jr

Hannes C Schniepp

Samantha I Applin

Nasef A Junaid

Sidney Eichelberger

Various embodiments provide ice mitigating surface coatings and methods for applying ice mitigating surface coatings. Various embodiment ice mitigating surface coatings may be formed by hydrolysis of one or more substituted n-alkyldimethylalkoxysilanes terminated with functionalities having the following characteristics with respect to water: 1) non-polar interactions; 2) hydrogen bonding through donor and acceptor interactions; or 3) hydrogen bonding through acceptor interactions only. The substituted n-alkyldimethylalkoxysilanes of the various embodiments may include methyl terminated species, hydroxyl terminated species, ethylene glycol terminated species, and methoxyethylene glycol terminated species. Various embodiment ice mitigating surface coatings may be applied to metal surfaces, such as aluminum surfaces. Various embodiment substituted n-alkyldimethylalkoxysilanes may have an aliphatic chain that is saturated and liner or branched or that is partially unsaturated and liner or branched.

Hydrogen-bonding surfaces for ice mitigation

Described herein are copoly(carbonate urethanes) with tunable properties. The copoly(carbonate urethanes) are produced from the reaction between an aryl diamine and an oligomer. By varying the molecular weight of the oligomer, the mechanical and thermal properties of the copoly(carbonate urethanes) can be modified (i.e., tuned). The copoly(carbonate urethanes) can be used to produce filaments for 3D printing applications that could have tunable properties for a variety of applications.

Copoly(urethane carbonates) with tunable properties and methods for making and using the same

A method of recycling a polymer structure includes converting a first polymer structure into feedstock. The first polymer structure comprises particles that are bonded to one another by chemical click bonds to form a first shape. The first polymer structure is converted into feedstock particles by breaking the click bonds. The feedstock particles are formed into a second shape, and the feedstock particles are chemically click-bonded together to form a second polymer structure having a second shape. Breaking the click bonds may include heating the particles. The structures may be formed by causing first particles having dienes to chemically bond to dienophiles of second particles.

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Chesapeake, VA, United States of America

Christopher J Wohl