Small-Angle Neutron Scattering Study on Charged Gels in Deformed State
Small-Angle Neutron Scattering Study on Charged Gels in Deformed State
复制标题
变形状态带电凝胶的小角中子散射研究
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Imai
中科院分区：
文献类型：
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作者：
M. Shibayama;Kazuki Kawakubo;Fumiyoshi Ikkai;M. Imai
用小角中子散射（SANS）研究了弱电荷温敏凝胶在形变状态下的结构。在低温下，凝胶是在一个良好的溶剂，散射强度图案是各向同性的，即使对于变形的凝胶。当温度升高到42 °C时，所谓的蝴蝶图案，即，在变形的凝胶中出现相对于拉伸方向的扁长形散射强度图案。随着温度进一步升高至46 °C，观察到散射最大值。在未变形凝胶的情况下，散射图案具有圆形最大值，其中q = qm，其中q是散射矢量的大小，qm是散射最大值处的q值。另一方面，对于变形的凝胶，散射图案变成扁球形，即，qm，y < qm，x，其中下标y和x分别表示拉伸和垂直方向。通过对SANS强度模式的分解，讨论了SANS强度模式的这些变化。
The structure of weakly charged temperature sensitive gels has been investigated in deformed state by means of small-angle neutron scattering (SANS). At low temperatures where the gel is in a good solvent, the scattered intensity pattern was isotropic even for deformed gels. When the temperature was raised to 42 °C, the so-called butterfly pattern, i.e., a prolate-shaped scattered intensity pattern with respect to the stretching direction, appeared in the deformed gels. With a further increase in temperature to 46 °C, a scattering maximum was observed. In the case of undeformed gel, the scattering pattern had a circular maximum with q = qm, where q is the magnitude of the scattering vector and qm is the q value at the scattering maximum. On the other hand, the scattering pattern became oblate for the deformed gel, i.e., qm,y < qm,x, where the subscripts y and x indicate the stretching and perpendicular directions, respectively. These changes of the SANS intensity patterns are discussed by decomposing it i...