In the present study the properties of novel cation-exchange membranes based on UV-oxidized polymethylpentene (PMP) with grafted sulfonated polystyrene are described. A correlation between the composition of the grafted copolymer (grafting degree, cross-linking degree) and transport properties (Na⁺-conductivity, permselectivity, diffusion permeability) of resulted membranes are discussed. It is shown that with increasing of grafting degree (GD) and lowering of cross-linking degree (CD) the concentration of functional groups in the inner solution and permselectivity decrease, while ionic conductivity increases. The obtained membranes have the GD ranging from 29 to 120% and CD from 0 to 5%. The best membranes have ionic surface resistance of 0.3–0.6 Ω cm² in 0.5 M NaCl, apparent cation transport numbers of 0.870–0.998 and NaCl diffusion permeability of 3.3 · 10⁻⁸–5.5 · 10⁻⁷ cm² s⁻¹, as well as satisfactory mechanical performance. A comparison of transport properties (conductivity and cation transport number) of the obtained membranes with a properties of number of available samples was made. It is noted that some of the obtained samples are at the level of the best perfluorinated homogeneous membranes in terms of the ratio of conductivity and cation transport numbers. High ionic conductivity and permselectivity make the prepared membranes promising candidates for possible applications in electrodialysis, dialysis, reverse electrodialysis, Red-Ox flow batteries and other membrane processes.

在本研究中，描述了基于紫外线氧化的聚甲基戊烯（PMP）和接枝磺化聚苯乙烯的新型阳离子交换膜的性能。讨论了接枝共聚物的组成（接枝度，交联度）与所得膜的传输性能（Na ^+-电导率，渗透选择性，扩散渗透率）之间的相关性。结果表明，随着接枝度（GD）的增加和交联度（CD）的降低，内溶液中官能团的浓度和渗透选择性降低，而离子电导率增加。所得膜的GD为29至120％，CD为0至5％。最好的膜的离子表面电阻为0.3–0.6Ωcm ²在0.5 M NaCl中，表观阳离子迁移数为0.870–0.998，NaCl扩散渗透率为3.3·10 ^-8 –5.5·10 ^-7  cm ²  s ^-1以及令人满意的机械性能。将获得的膜的传输特性（电导率和阳离子传输数）与可用样品数量的特性进行比较。注意，就电导率和阳离子迁移数之比而言，一些获得的样品处于最佳的全氟化均质膜水平。高离子电导率和渗透选择性使制备的膜有望用于电渗析，渗析，反电渗析，Red-Ox液流电池和其他膜工艺中。