Sulfonated Poly(arylene sulfide sulfone nitrile) Multiblock Copolymers with Ordered Morphology for Proton Exchange Membranes

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• 作者：Dong Won Shin ; So Young Lee ; Chang Hyun Lee ; Kwan-Soo Lee ; Chi Hoon Park ; James E. McGrath ; Mingqiang Zhang ; Robert B. Moore ; Mark D. Lingwood ; Louis A. Madsen ; Young Taek Kim ; Inchul Hwang ; Young Moo Lee
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：October 8, 2013
• 年：2013
• 卷：46
• 期：19
• 页码：7797-7804
• 全文大小：536K
• 年卷期：v.46,no.19(October 8, 2013)
• ISSN：1520-5835

文摘

Ordered morphologies in disulfonated poly(arylene sulfide sulfone nitrile) (SPSN) copolymers were generated via thermal annealing followed by multiblock copolymer synthesis. While SPSN random copolymers (R-SPSN) showed featureless morphologies, the SPSN multiblock copolymers (B-SPSN) exhibited cocontinuous lamellar morphologies with a center-to-center interdomain size of up to 40 nm. In spite of the well-ordered, interconnected hydrophilic domains, the water self-diffusion coefficient (e.g., D = (0.7鈥?.0) 脳 10^鈥?0 m² s^鈥?) and proton conductivity (e.g., 蟽 = 0.16鈥?.20 S cm^鈥? in deionized water at 30 掳C) through B-SPSN were lower than those of the corresponding R-SPSN (e.g., D = (3.5鈥?.9) 脳 10^鈥?0 m² s^鈥? and 蟽 = 0.21 S cm^鈥?) due to the relatively lower water uptake of the B-SPSN after thermal annealing. The reduced water uptake of B-SPSN was beneficial to reduction of peroxide degradation rate. Thermal annealing produced significant gains in morphological ordering and finer control over desired membrane properties for proton conduction applications.