Polymer glass transition temperature manipulation via Z/E hydrazone photoswitching
AssigneeTrustees of Dartmouth College
InventorsIvan Abrahamian, Sirun Yang, Laura L. Jeliazkov, Jared D. Harris
Life of this patent
Estimating the term…
Abstract
In an embodiment, the present disclosure pertains to a method of changing the glass transition temperature of a polymer. In some embodiments, the polymer includes at least one hydrazone-containing compound. In general, the methods of the present disclosure include one or more of the following steps of: (1) applying light to the polymer; and (2) thereby changing the glass transition temperature of the polymer. In another embodiment, the present disclosure pertains to a polymer having a light-adjustable glass transition temperature. In some embodiments, the polymer includes at least one hydrazone-containing compound.
Claims18
A method of changing the glass transition temperature (Tg) of a polymer, wherein the polymer is covalently linked to at least one hydrazone-containing compound, and wherein the method comprises:
- applying light to the polymer,
- wherein the light changes the glass transition temperature (Tg) of the polymer, and wherein the polymer is selected from the group consisting of polyethylene, polypropylene, polystyrene, poly(vinyl chloride), polyisobutylene, poly(methyl acrylate), poly(methyl methacrylate), polytetrafluoroethylene, poly(acrylic acid), polyacrylamide, polyacrylonitrile, poly(hydroxyethyl methacrylate), poly(hydroxyethyl acrylate), and combinations thereof.
A polymer comprising a light-adjustable glass transition temperature (Tg), wherein the polymer is covalently linked to at least one hydrazone-containing compound, and wherein the at least one hydrazone-containing compound is selected from the group consisting of:
- and combinations thereof, wherein n is an integer of more than 1.
A polymer comprising a light-adjustable glass transition temperature (Tg), wherein the polymer is covalently linked to at least one hydrazone-containing compound, wherein the at least one hydrazone-containing compound comprises:
- or combinations thereof, and wherein Y, R1 and R2 each independently comprises the polymer.
A method of changing the glass transition temperature (Tg) of a polymer, wherein the polymer is covalently linked to at least one hydrazone-containing compound, and wherein the method comprises:
- applying light to the polymer, wherein the light changes the glass transition temperature (Tg) of the polymer,
- wherein the at least one hydrazone-containing compound comprises:
- or combinations thereof, and wherein Y, R1 and R2 each independently comprises the polymer.
A method of changing the glass transition temperature (Tg) of a polymer, wherein the polymer is covalently linked to at least one hydrazone-containing compound, and wherein the method comprises:
- applying light to the polymer, wherein the light changes the glass transition temperature (Tg) of the polymer,
- wherein the at least one hydrazone-containing compound comprises:
- or combinations thereof, and
- wherein Y, R1 and R2 are each independently selected from the group consisting of CH2CH3, C(CH3), (CH2)5CH3, (CH2)7CH3, (CH2)9CH3, (CH2)11CH3, (CH2)1-20CH3, t-butyl, n-hexyl, n-octyl, n-decyl, n-dodecyl,
- wherein n is an integer of more than 1.
A method of changing the glass transition temperature (Tg) of a polymer, wherein the polymer is covalently linked to at least one hydrazone-containing compound, and wherein the method comprises:
- applying light to the polymer, wherein the light changes the glass transition temperature (Tg) of the polymer, and
- wherein the at least one hydrazone-containing compound is selected from the group consisting of:
- and combinations thereof, wherein n is an integer of more than 1.
Dependencies are inferred from the claim text.