The Self - Assembly of Polymer Blends in Selective Solvents
The Self - Assembly of Polymer Blends in Selective Solvents
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发表时间：
2000
影响因子：
2.5
通讯作者：
Yuan Xiao;A. Ying
中科院分区：
文献类型：
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作者：
Yuan Xiao;A. Ying
用动态光散射法研究了轻磺化PS(SPS)与P4VP共混物在选择性溶剂中的自组装行为。当SPS/THF溶液滴加到过量的P4VP/甲醇溶液中时，形成稳定的孤立粒子和粒子团，双峰强度分布证明了这一点。粒子的稳定性可以归因于溶剂化的P4VP链通过特定的相互作用附着在折叠的SPS链上。研究了颗粒的平均流体力学直径与P4VP/甲醇溶液初始浓度的关系。透射电子显微镜还观察到了孤立的颗粒和颗粒团。还考察了铜离子的加入对聚合物共混物在溶液中组装的影响。结果表明，在SPS/P4VP溶液中加入CuSO4/H2O溶液，Cu2+桥联了更多的粒子或团簇。加入CuSO4/H2O溶液后，孤立粒子的流体力学直径从44 nm增大到90 nm，粒子团簇的流体动力学直径从146 nm增大到277 nm。
The self- assembly of blends of lightly sulfonated PS (SPS) and P4VP in selective solvents was studied by dynamic light scattering. When SPS/THF solution was added dropwise into excessive P4VP/ methanol solution, stable isolated particles and particle clusters formed as evidenced by the bimodal intensity distribution. The stability of the particles can be attributed to the solvated P4VP chains which are attached to the collapsed SPS chains by the specific interactions. The relationship between the average hydrodynamic diameter of the particles and the initial concentration of the P4VP/methanol solution was studied. Isolated particles and particle clusters were also observed by TEM. The effect of addition of copper ions on the assembly of polymer blends in the solution was also examined. It was found that by adding CuSO4/H2O solution into the SPS/P4VP solution, more particles or clusters were bridged by Cu2+ . The hydrodynamic diameter of the isolated particles and particle clusters increased from 44nm to 90nm, and 146nm to 277nm, respectively, after adding CuSO4/H2O solution into the original solution.