Hydroxide-ion transport and stability of diblock copolymers with a polydiallyldimethyl ammonium hydroxide block

作者：Cotanda Pepa; Petzetakis Nikos; Jiang Xi; Stone Greg; Balsara Nitash P^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2017, 55(13): 2243-2248.

DOI：10.1002/pola.28611

• base-stable
• base
• block copolymer
• conducting materials
• conductivity
• diallyl dimethyl ammonium chloride (DADMAC)
• diblock copolymer
• hydroxide conductivity
• ion exchange

Base-stable amphiphilic diblock copolymers with a polydiallyl dimethyl ammonium hydroxide block were synthesized and characterized to quantify hydroxide-ion transport in the hydrated state; polystyrene was the hydrophobic block. The challenge of synthesizing a copolymer comprising blocks with very different solubility behaviors was addressed by a combination of reversible addition fragmentation chain transfer polymerization and ion metathesis. Both monomers used in the polymerization are commercially available on industrial scales. Hydroxide-ion conductivities of 0.8 mS/cm were achieved in hot-pressed membranes immersed in water at room temperature despite relatively low water uptake (4.2 water molecules per hydroxide ion). The stability of the polydimethyl ammonium hydroxide chains was investigated in 2 M NaOD at 60 degrees C. H-1 NMR spectroscopy studies showed no detectable degradation after 2000 hours.

• 出版日期2017-7-1