US 11,987,654 B2
Polymer glass transition temperature manipulation via z/e hydrazone photoswitching
Ivan Abrahamian, Hanover, NH (US); Sirun Yang, Hanover, NH (US); Laura L. Jeliazkov, Hanover, NH (US); and Jared D. Harris, Hanover, NH (US)
Assigned to Trustees of Dartmouth College, Hanover, NH (US)
Filed by Trustees of Dartmouth College, Hanover, NH (US)
Filed on Dec. 20, 2022, as Appl. No. 18/085,404.
Application 18/085,404 is a continuation of application No. 17/017,222, filed on Sep. 10, 2020, granted, now 11,566,089.
Claims priority of provisional application 62/899,991, filed on Sep. 13, 2019.
Prior Publication US 2023/0125498 A1, Apr. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 20/36 (2006.01); C08F 8/48 (2006.01); C08F 16/28 (2006.01); C08F 18/22 (2006.01); C08F 20/34 (2006.01); C08F 22/22 (2006.01); C08F 220/30 (2006.01); C08F 220/34 (2006.01); C08F 220/36 (2006.01); C08F 222/22 (2006.01); C08F 20/60 (2006.01); C08F 120/34 (2006.01); C08F 120/36 (2006.01); C08F 120/60 (2006.01); C08F 122/16 (2006.01); C08F 122/22 (2006.01); C08F 212/14 (2006.01); C08F 218/00 (2006.01)
CPC C08F 20/36 (2013.01) [C08F 8/48 (2013.01); C08F 16/28 (2013.01); C08F 18/22 (2013.01); C08F 20/34 (2013.01); C08F 22/22 (2013.01); C08F 220/30 (2013.01); C08F 220/34 (2013.01); C08F 220/36 (2013.01); C08F 222/22 (2013.01); C08F 20/60 (2013.01); C08F 120/34 (2013.01); C08F 120/36 (2013.01); C08F 120/60 (2013.01); C08F 122/16 (2013.01); C08F 122/22 (2013.01); C08F 212/26 (2020.02); C08F 218/22 (2020.02); C08F 222/225 (2020.02)] 18 Claims
OG exemplary drawing
 
1. A method of increasing the glass transition temperature (Tg) of a polymer,
wherein the polymer is covalently linked to at least one hydrazone-containing compound,
wherein the hydrazone-containing compound comprises:

OG Complex Work Unit Chemistry
or combinations thereof,
wherein at least one of Y and R1 comprises the polymer,
wherein Y, R1 and R2 are each independently selected from the group consisting of H, alkyl groups, alkenyl groups, alkoxy groups, aryl groups, ketone groups, amine groups, amide groups, carboxyl groups, carboxylic acid groups, ester groups, thiol groups, sulfoxide groups, alcohol groups, alkyne groups, azide groups, CH2CH3, C(CH3), (CH2)5CH3, (CH2)7CH3, (CH2)9CH3, (CH2)11CH3, (CH2)1-20CH3, t-butyl, n- hexyl, n-octyl, n-decyl, n-dodecyl and combinations thereof, and
wherein the method comprises:
applying light to the polymer,
wherein the light increases the glass transition temperature (Tg) of the polymer,
wherein the increase in Tg occurs through photo-isomerization, and
wherein the hydrazone in the hydrazone-containing compound transitions from a Z state to an E state upon photoisomerization.