A series of multiblock copolymers based on semi-crystalline hydrophobic poly(ether ketone) segments and partially fluorinated hydrophilic poly(arylene ether sulfone) segments were prepared for applications as proton exchange membranes. Through acidification, poly(ether ketimine) precursors were transformed into semi-crystalline acid form poly(ether ketone) segments. Nanophase separated morphologies were observed via small angle X-ray scattering with ion cluster dimensions ranging from 15.1 nm to 17.5 nm. Due to semi-crystalline domains within the polymer, these membranes exhibited outstanding chemical and mechanical stabilities as well as enhanced conductivities under fully hydrated and reduced humidity conditions. Moreover, film processing studies indicated that enhanced nanophase separation and desired membrane properties could be achieved via thermal annealing. All annealed PEK-6FBPSH membranes exhibited increased ion cluster dimensions ranging from 19.3 nm to 27.9 nm with significantly improved proton conductivities. Annealed membrane 4-b-14 were superior to Nafion 212 at low humidity and a wide temperature range.

制备了一系列基于半结晶疏水聚（醚酮）链段和部分氟化的亲水聚（亚芳基醚砜）链段的多嵌段共聚物，以用作质子交换膜。通过酸化，将聚（醚酮亚胺）前体转化为半结晶酸形式的聚（醚酮）链段。通过小角度X射线散射观察到纳米相分离的形态，离子簇尺寸范围为15.1 nm至17.5 nm。由于聚合物中存在半结晶区，因此这些膜在充分水合和降低湿度的条件下表现出出色的化学和机械稳定性以及增强的电导率。此外，薄膜加工研究表明，可以通过热退火实现增强的纳米相分离和所需的膜性能。所有退火的PEK-6FBPSH膜均显示出增加的离子簇尺寸，范围从19.3 nm至27.9 nm，并且质子传导率显着提高。在低湿度和宽温度范围内，退火膜4-b-14优于Nafion 212。