Random copolymers of poly(4‐vinylpyridine) and polyisoprene were synthesized, and subsequently quaternized with 1‐alkylbromides. The number of carbons on the pendant side‐chain of the resultant comb‐shaped polymer, n, ranged from 2–8. The comb‐shaped polymers were crosslinked employing thiol‐ene chemistry to give mechanically robust ion conducting membranes. Analysis by wide and medium‐angle X‐ray scattering show three morphology regimes that are dependent on the number of carbons on the pendant side‐chains. When n = 2, ionomer cluster morphology was dominant, when n = 8 backbone‐backbone morphology was dominant, and when n = 3–6, the membrane showed a coexistence of both ionomer cluster and backbone‐backbone morphologies. Evaluation of the water uptake of the membranes showed a maximum water uptake per cation of 9.5 when n = 5 at 95% relative humidity (RH) and 60°C. Conductivity of the samples characterized by electrochemical impedance spectroscopy showed bromide conductivity as high as 110 mS/cm when n = 3 at 95% RH and 90°C.

中文翻译：

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通过在离子交换膜中共聚离聚物簇和骨架-骨架的形态来优化阴离子电导率

合成了聚（4-乙烯基吡啶）和聚异戊二烯的无规共聚物，然后用1-烷基溴化物季铵化。所得梳状聚合物侧链侧链上的碳原子数n为2-8 。梳形聚合物通过硫醇化学进行交联，得到机械坚固的离子传导膜。广角和中角X射线散射分析显示了三种形态学形态，这取决于侧链侧链上的碳数。当n = 2时，离聚物簇形态占主导；当n = 8骨架-骨干形态占主导；当n =3–6，该膜显示了离聚物簇和骨架-骨干形态的共存。膜的吸水率的评估表明，在95％相对湿度（RH）和60°C下，n = 5时，每个阳离子的最大吸水率是9.5 。通过电化学阻抗谱表征的样品的电导率表明，在95％RH和90°C下，当n = 3时，溴化物的电导率高达110 mS / cm 。