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
，
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，高聚合物的气体透过系数；
声
：以上例句、词性分类均由互联
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