free valency
英 [friː ˈveɪlənsi]
美 [friː ˈveɪlənsi]
自由价
双语例句
- A sample of polyurethane ionomer is studied by small angle X-ray scattering, positron annihilation and density measurement. The experimental results demonstrate that the counter-ion radius, domain volume and density of polyurethane ionomer increase and free volume decreases with valency of the metal ion increasing.
本文用聚氨酯离聚体材料作X射线小角度散射实验，同时还作了正电子湮没及比重法测量材料密度的辅助实验，以研究聚氨酯离聚体微畴体积随金属离子价改变。