Association of Copolymer Acrylic Acid/Methyl-acrylic acid/Butyl Acrylate in Aqueous Solution

被引：0
|
作者：
Xu, Gui-Ying [1 ]
Yang, Yan-Lian [1 ]
Yuan, Shi-Ling [1 ]
Chen, Ai-Min [1 ]
Zheng, Li-Qiang [1 ]
机构：
[1] Key Lab. Colloid Interface Chem. E., Shandong University, Jinan 250100, China
来源：
Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities | 2001年 / 22卷 / 09期
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摘要：
The associations of triblock copolymer made of acrylic acid, methyl-acrylic acid and butyl acrylate in aqueous solution as well as in NaCl and CaCl2 solutions were studied by using fluorescence. The micelle-like clusters(MLCs) of copolymer formed is able to solubilize non-polar material. A little electrolytes added in the copolymer solution can increase the value of critical aggregation concentration (ρac) and micropolarity. But with the increase of the concentration of electrolytes, the value of ρac and micropolarity will decrease. When there is NaCl with fixed concentration in the systems, the process of the MLCs loosening is relaxed because of the charge-screening. In the systems with fixed CaCl2 concentration, Ca2+ induced the cross-link of - COO- groups, so the interface between the MLCs and the water is not obvious and the big MLCs is formed between the clusters.
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