Shape memory poly(β-hydroxythioether) foams rapidly produced from multifunctional epoxides and thiols
A shape memory polymer foam comprising a reaction product of a reaction of an epoxide and a thiol monomer in the presence of an organobase is provided. In addition, a method of making the shape memory polymer foam is provided. The method includes reacting an epoxide with thiol monomers in the presence of an organobase to form the shape memory polymer foam.
1 . A method of making a shape memory polymer foam, the method comprising:
reacting an epoxide with a thiol monomer in the presence of an organobase to form the shape memory polymer foam;
wherein the reacting the epoxide with the thiol monomer is further in the presence of acetone.
2 . The method of claim 1 , wherein the organobase comprises 1,8-diazabicyclo[5.4.0]undec-7-ene.
3 . The method of claim 1 , wherein the thiol monomers comprise pentaerythritoltetra(3-mercaptopropionate).
4 . The method of claim 1 , wherein the epoxide comprises bisphenol A diglycidyl ether.
5 . The method of claim 1 , wherein the shape memory polymer foam comprises poly(β-thioether).
6 . A method of making a shape memory polymer foam, the method comprising:
reacting an epoxide with a thiol monomer in the presence of an organobase, a salt, and acetone to form a shape memory polymer foam-salt composite
removing at least a portion of the salt from the shape memory the shape memory polymer foam-salt composite to form the shape memory polymer foam.
7 . The method of claim 6 , wherein removing at least the portion of the salt is done by washing the shape memory polymer foam-salt composite.
8 . The method of claim 6 , wherein the epoxide is selected from a group consisting of bisphenol A diglycidyl ether (BADGE), BADGE derivatives, neopentyl monomer (NEO), NEO derivatives, N epoxide, Isophorone di(oxiran-2-methyl carbamate) (IDPI) epoxide, IDPI epoxide derivatives, and combinations thereof.
9 . A method of making a shape memory polymer foam, the method comprising:
reacting pentaerythritoltetra(3-mercaptopropionate) and bisphenol A diglycidyl ether in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene to form a filament;
printing the filament into a form using a 3-D printer.
10 . A method of making a shape memory polymer foam, the method comprising:
reacting an epoxide with a thiol monomer in the presence of an organobase to form the shape memory polymer foam;
wherein the organobase comprises 1,8-diazabicyclo[5.4.0]undec-7-ene.
11 . The method of claim 10 , wherein the thiol monomers comprise pentaerythritoltetra(3-mercaptopropionate).
12 . The method of claim 10 , wherein the epoxide comprises bisphenol A diglycidyl ether.
13 . The method of claim 10 , wherein the shape memory polymer foam comprises poly(β-thioether).
14 . The method of claim 10 , wherein the reacting the epoxide with the thiol monomer is further in the presence of acetone.