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
强的高分子链段中引进柔基因，可提高聚合物的气
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.
在刚强的高分子链段中引进柔基因，可提高聚合物的气系数；
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