Anion exchange membranes and polymers for use in same

Patent metadata

Field	Value
Publication number	US-2017203289-A1
Application number	US-201515326538-A
Country	US
Kind code	A1
Filing date	Jul 22, 2015
Priority date	Jul 22, 2014
Publication date	Jul 20, 2017
Grant date	—

Abstract

Embodiments of the invention relate generally to anion exchange membranes and, more particularly, to anion exchange membranes comprising a styrene block copolymer and methods for their manufacture. In one embodiment, the invention provides a polymer according to formula IV, wherein x and y are mol %, QA is or each of R 1 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain.

First claim

1 . A polymer according to formula IX

wherein x and y are mol % and n is 1-10.

2 . A method of preparing the polymer of claim 1 , the method comprising:
immersing a polymer of formula VIII in aqueous trimethylamine; heating the mixture to approximately 50° C.; rinsing the polymer with water; and immersing the resulting polymer in sodium hydroxide

wherein x and y are mol % and n is 1-10.

3 . The method of claim 2 , further comprising:
forming the polymer of formula VIII by:
mixing a polymer of formula VII with an alcohol of formula 3

adding to the mixture a quantity of anhydrous dichloromethane;
cooling the mixture;
adding to the mixture a quantity of trifluoromethanesulfonic acid; and
precipitating the polymer of formula VIII in methanol,

wherein x and y are mol % and n is 1-10.

4 . A polymer according to formula XII

wherein x and y are mol % and n is 1-10.

5 . A method of preparing the polymer of claim 4 , the method comprising:
immersing a polymer of formula XI in a quantity of trimethylamine; heating the mixture to approximately 50° C. for approximately 48 hours; rinsing the polymer with water; and immersing the polymer in sodium hydroxide

wherein x and y are mol % and n is 1-10.

6 . The method of claim 5 , further comprising:
preparing the polymer of formula XI by:
dissolving a polymer of formula X in a quantity of anhydrous dichloromethane;
adding to the mixture a quantity of triethylsilane and trifluoroacetic acid;
precipitating the polymer of formula XI in methanol

wherein x and y are mol % and n is 1-10.

7 . The method of claim 6 , further comprising:
preparing the polymer of formula X by:
mixing a polymer of formula VII with a quantity of 6-bromohexanoyl chloride;
adding to the mixture a quantity of anhydrous dichloromethane;
cooling the mixture;
adding to the mixture a quantity of aluminum chloride

wherein x and y are mol %.

8 . A polymer according to formula IV

wherein x and y are mol %, QA is

each of R 1 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain.

9 . A method of preparing the polymer of claim 8 , the method comprising:
methylizing a polymer of formula III; and carrying out an ion exchange reaction on the resulting polymer

wherein x and y are mol %, QA is

each of R 1 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain.

10 . The method of claim 9 , further comprising:
preparing the polymer of formula III by:
carrying out a palladium-catalyzed Suzuki coupling reaction using a polymer of formula II and an aryl bromide-containing amine

wherein x and y are mol %.

11 . The method of claim 10 , further comprising:
preparing the polymer of formula II by:
carrying out an iridium-catalyzed borylation using a polymer of formula I and bis(pinacolato)diboron

wherein x and y are mol %.

12 . A fuel cell alkaline exchange membrane, a fuel cell ionomer, an electrolysis alkaline exchange membranes, or an actuator comprising at least one polymer selected from a group consisting of:
a polymer of formula IV

wherein x and y are mol %, QA is

each of R 1 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain;
a polymer of compound IX

wherein x and y are mol % and n is 1-10; and
a polymer of compound XII

wherein x and y are mol % and n is 1-10.

Assignees

• Rensselaer Polytech Inst

Inventors

• Bae Chulsung
• Mohanty Angela Dee

Classifications

• C08F8/18

  Introducing halogen atoms or halogen-containing groups · CPC title

• C08F2800/10

  as molar percentages · CPC title

• C08J5/2243

  obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231 · CPC title

• C08F8/30

  Introducing nitrogen atoms or nitrogen-containing groups · CPC title

• C08F2810/50

  wherein the polymer is a copolymer and the modification is taking place only on one or more of the monomers present in minority · CPC title