Ionic polymer compositions

Patent metadata

Field	Value
Publication number	US-11545614-B2
Application number	US-201916458514-A
Country	US
Kind code	B2
Filing date	Jul 1, 2019
Priority date	Jul 3, 2018
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A dielectric polymeric composition comprising a polymeric matrix comprising structural units derived from a polymerizable vinyl monomer; an ionic liquid comprising an organic cation and a balancing anion, wherein the ionic liquid is miscible or partially miscible with the polymerizable vinyl monomer, and wherein the concentration of ionic liquid in dielectric polymeric composition ranges from 0.5 to 30 wt. %; and less than 10 ppm of unreacted polymerizable vinyl monomer, based on the total weight of the composition, wherein an amount of unreacted polymerizable vinyl monomer in the composition is measured via HPLC. The polymeric matrix further comprises structural units derived from a polymerizable co-monomer comprising a functional group that has the ability to form hydrogen bonds within the polymeric matrix. The polymeric matrix further comprises a crosslinking agent, and wherein the polymeric matrix comprises covalent crosslinks between the crosslinking agent and the structural units derived from the polymerizable vinyl monomer.

First claim

What is claimed is:

1. A dielectric polymeric composition comprising:
(a) a polymeric matrix, wherein the polymeric matrix comprises structural units derived from at least one polymerizable vinyl monomer and (ii) a crosslinking agent, structural units derived from a polymerizable co-monomer, or both a crosslinking agent and structural units derived from a polymerizable co-monomer; wherein the polymerizable co-monomer comprises at least one functional group that has the ability to form hydrogen bonds within the polymeric matrix; and wherein, when the crosslinking agent is present, the polymeric matrix comprises covalent crosslinks between the crosslinking agent and the structural units derived from the at least one polymerizable vinyl monomer;
(b) an ionic liquid, wherein the ionic liquid comprises an organic cation and a balancing anion, wherein the ionic liquid is miscible or partially miscible with the at least one polymerizable vinyl monomer, and wherein the concentration of the ionic liquid in the dielectric polymeric composition ranges from about 0.5 wt. % to about 30 wt. %; and
(c) less than about 10 ppm of unreacted polymerizable vinyl monomer, based on the total weight of the dielectric polymeric composition, wherein an amount of unreacted polymerizable vinyl monomer in the dielectric polymeric composition is measured via high performance liquid chromatography (HPLC).

2. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition comprises a continuous polymeric phase comprising the polymeric matrix having dispersed therein an ionic liquid dispersed phase, wherein the ionic liquid dispersed phase comprises the ionic liquid.

3. The dielectric polymeric composition of claim 2 , wherein the ionic liquid is compatible with the polymeric matrix, and wherein a difference between a glass transition temperature (T g ) of the polymeric matrix and a T g of the dielectric polymeric composition is equal to or greater than about 25° C.

4. The dielectric polymeric composition of claim 3 , wherein the ionic liquid dispersed phase has an average cross section size of less than about 200 nm; and wherein the dielectric polymeric composition is transparent.

5. The dielectric polymeric composition of claim 2 , wherein the ionic liquid is partially compatible with the polymeric matrix, and wherein a difference between a T g of the polymeric matrix and a T g of the dielectric polymeric composition is from about 5° C. to about 25° C.

6. The dielectric polymeric composition of claim 5 , wherein the ionic liquid dispersed phase has an average cross section size of equal to or greater than about 200 nm.

7. The dielectric polymeric composition of claim 1 , wherein the concentration of the ionic liquid in the dielectric polymeric composition ranges from about 1 wt. % to about 10 wt. %.

8. The dielectric polymeric composition of claim 1 , wherein the ionic liquid imparts flexibility to the dielectric polymeric composition, wherein the dielectric polymeric composition is characterized by a storage modulus that is lower than the storage modulus of the polymeric matrix in the absence of the ionic liquid.

9. The dielectric polymeric composition of claim 1 , wherein the at least one polymerizable vinyl monomer comprises at least one polymerizable acrylate monomer and wherein the at least one polymerizable acrylate monomer comprises methyl acrylate, ethyl acrylate, methacrylate, methyl methacrylate (MMA), butyl methacrylate, or combinations thereof.

10. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition is ferroelectric.

11. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition is characterized by a low polarization loss, and wherein the polarization loss is less than about 35%.

12. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition is characterized by a maximum polarization of equal to or greater than about 0.4 μC/cm 2 , under an applied electric field of 150 kV/cm.

13. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition is characterized by a remnant polarization of equal to or greater than about 0.1 μC/cm 2 , subsequent to removal of an applied electric field of 150 kV/cm.

14. The dielectric polymeric composition of claim 1 , wherein the dielectric polymeric composition is characterized by a coercive field of equal to or greater than about 20 kV/cm, under an applied electric field of 150 kV/cm.

15. A method for making a dielectric polymeric composition, the method comprising:
(a) subjecting a mixture comprising an ionic liquid and a polymerizable precursor comprising at least one polymerizable vinyl monomer to in situ polymerization conditions to form a precursor dielectric polymeric composition, wherein the polymerizable precursor comprises a polymerizable co-monomer, a crosslinking agent, or both a polymerizable co-monomer and a crosslinking agent, wherein the ionic liquid comprises an organic cation and a balancing anion, wherein the precursor dielectric polymeric composition comprises a polymeric matrix, the ionic liquid, unreacted polymerizable vinyl monomer and optionally unreacted polymerizable co-monomer, wherein the polymeric matrix comprises polymerized vinyl monomer and optionally polymerized co-monomer, wherein the polymerizable co-monomer comprises at least one functional group that has the ability to form hydrogen bonds within the polymeric matrix, wherein the crosslinking agent, when present, covalently crosslinks the polymeric matrix, and wherein the ionic liquid is compatible or partially compatible with the polymeric matrix; and
(b) removing at least a portion of the unreacted polymerizable vinyl monomer from the precursor dielectric polymeric composition to form the dielectric polymeric composition; wherein the dielectric polymeric composition comprises the polymeric matrix, the ionic liquid, and less than about 10 ppm of unreacted polymerizable vinyl monomer, based on the total weight of the dielectric polymeric composition, wherein an amount of unreacted polymerizable vinyl monomer in the dielectric polymeric composition is measured via high performance liquid chromatography (HPLC); and wherein the concentration of the ionic liquid in the dielectric polymeric composition ranges from about 0.5 wt. % to about 30 wt. %.

16. The method of claim 15 , wherein the ionic liquid is miscible or partially miscible with the at least one polymerizable vinyl monomer.

17. The dielectric polymeric composition of claim 1 , wherein the at least one functional group that has the ability to form hydrogen bonds within the polymeric matrix is selected from the group consisting of a hydroxyl group, a carboxyl group, an amino group, an imino group, and combinations thereof.

18. The dielectric polymeric composition of claim 1 , wherein the crosslinking agent comprises tetraethylene glycol diacrylate (TEGDA), tetraethylene glycol dimethacrylate (TEGDMA), ethylene glycol dimethacrylate (EGDMA), diethylene glycol dimethacrylate (DEGDMA), hexamethylene glycol dimethacrylate(HMGDMA), polyethylene glycol diacrylate (PEGDA), polyethylene glycol dimethacrylate (PEGDMA), trimethylol propane triacrylate (TMPTA), or combinations thereof.

Assignees

• Sabic Global Technologies Bv

Inventors

• Guhathakurta Soma
• Dhanabalan Anantharaman
• Ganapathy Bhotla Venkata Ramanarayanan
• Subbaiah Yogesha

Classifications

• G06F3/016

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• G06F2203/04106

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• C08K5/55

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