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Initiator (4,4'-azo-bis-(4-cyanovaleric acid), ACVA), inhibitor (hydroquinone) and sodium hydroxide were also purchased from Sigma-Aldrich. Sodium chloride from EMD Millipore (Etobicoke, Ontario, Canada) was used as received.
Nitrogen gas (4. 8 grade) purchased from Praxair (Mississauga, Ontario, Canada) was used for degassing solutions.
Polymer Synthesis Aqueous monomer solutions with a monomer concentration of 1 M and an initiator (ACVA) concentration of 0.