ON THE DYNAMIC CHARACTER OF ORDERED STRUCTURE IN POLYMER LATEX SUSPENSIONS
ON THE DYNAMIC CHARACTER OF ORDERED STRUCTURE IN POLYMER LATEX SUSPENSIONS
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DOI：
10.1021/ja00229a004
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发表时间：
1988-10-12
影响因子：
15
通讯作者：
ISE, N
中科院分区：
文献类型：
--
作者：
ITO, K;NAKAMURA, H;ISE, N
对聚合物胶乳悬浮液进行了详细的微观研究。特别强调的是放置在动态方面的有序结构，通过使用视频图像和图像数据分析仪。这种技术使我们能够在更长的时间跨度内处理大量的粒子（通常为200个粒子），与我们以前的论文中几乎“手动”处理非常有限数量的粒子相比，这大大提高了数据的可靠性。局部有序结构的变化（实际上是消失）被证明。在有序和无序结构之间的边界区域的颗粒也被证明是动态的。在低浓度下，有序区域中粒子的热运动是显著的。发现热运动在10和60 ℃下相当大，但在30 ℃下不那么明显，当考虑到水的介电常数的温度依赖性时，可以理解这一点。比较了粒子在有序和无序共存结构中的运动。动力学研究的结果表明，必须明确区分这两种共存的结构，虽然有序结构是远离理想的晶格。
A detailed microscopic study on polymer latex suspensions has been carried out. Particular emphasis is placed on the dynamic aspects of the ordered structure by using video imagery and an image data analyzer. This technique allows us to treat a large number of particles (usually 200 particles) over a longer time span, which improves considerably the reliability of the data compared to the almost “manual” treatment for a very limited number of particles as in our previous papers. The variation (actually disappearance) of localized orderedstructures is demonstrated. The particles in the border regions between the ordered and disordered structures are also shown to be dynamic. Thethermal motion of the particles in the ordered regions was found to be substantial at low concentrations. The thermal motion was found to be considerable at 10 and 60 C but not so pronounced at 30 C, which can be understood when the temperature dependence of the dielectric constant of water is taken into consideration. The motion of the particles in the coexisting ordered and disordered structures is compared. The results of the dynamical study indicated that a clear distinction must be made between the two coexisting structures, although the ordered structure is far from an ideal lattice.