Anion exchange membranes and polymers for use in same
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.
1. A polymer according to formula IV
wherein x and y are mol %, QA is
each of R1 and R2 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.
2. A method of preparing the polymer of claim 1 , the method comprising:
methylizing a polymer of formula III; and
carrying our an ion exchange reaction on the resulting polymer
wherein x and y are mol %, QA is
each of R1 and R2 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.
3. The method according to claim 2 , 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 %.
4. The method of claim 3 , further comprising:
preparing the polymer of formula II by:
carrying our an iridium-catalyzed borylation using a polymer of formula I and bis(pinacolato)diboron
wherein x and y are mol %.