The paper presents the new data of gas transfer characteristics of semicrystalline poly(4-methyl-1-pentene) (PMP) as for films as for hollow fibers (HFs) with dense selective layer. The experimental data obtained earlier made it possible to calculate the gas transport characteristics of the amorphous and crystalline phases of PMP for some gases at temperature from 10 to 80 °C (below and above T_g). On the basis of these data and using the correlation approach, an assessment of the expected gas transport characteristics of HFs based on PMP was carried out in this work for helium and lower hydrocarbons, as well as for water vapors. It is shown that crystalline phase is very permeable and higher crystallinity degree leads to the increasing of PMP selectivity. Laboratory-scale membrane module with commercial hollow fibers of PMP was prepared and successfully tested by the differential method of gas permeability. Application of crazing method which should increase the crystallinity degree of PMP seems promising for the production of perspective HFs with improved transport and separation performance compared with the existing ones.

中文翻译：

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聚（4-甲基-1-戊烯）致密气体分离中空纤维的应用前景

本文介绍了半结晶聚（4-甲基-1-戊烯）（PMP）的气体传输特性的新数据，如同具有稠密选择层的中空纤维（HFs）薄膜一样。较早获得的实验数据使得有可能计算某些气体在10至80°C（低于T _g和高于T _g）。在这些数据的基础上，并使用相关方法，在这项工作中，针对氦气，低碳氢化合物以及水蒸气，对基于PMP的HF的预期气体传输特性进行了评估。结果表明，结晶相具有很高的渗透性，较高的结晶度导致PMP选择性的提高。制备了具有商业用途的PMP中空纤维的实验室规模的膜组件，并通过气体渗透率的差分方法成功进行了测试。裂纹法的应用应增加PMP的结晶度，这似乎对生产透视HF很有希望，与现有方法相比，HF的传输和分离性能有所提高。