【摘要】 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。实验结果表明,随着金属离子价数的增加,反离子半径增大,微畴的体积增大,致使材料的密度增大,自由体积相应减小。更多还原

【Abstract】 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. The application ranges of small angle X-ray scattering and positron annihilation are discussed and showed that positron annihilation is one of significant methods for studying domain volume in ionomer.更多还原