Polyaramide with easily rotational backbone has higher gas permeability, For two polymers with the same backbone, gas permeability is higher for one with methyl side group in its aroma-tic ring.
在刚性强的高分子链段中引进柔性基因，可提高聚合物的气体透过系数；
Polyaramide with easily rotational backbone has higher gas permeability, For two polymers with the same backbone, gas permeability is higher for one with methyl side group in its aroma-tic ring.
在刚性强的高分子链段中引进柔性基因，可提高聚合物的气体透过系数；
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