Aqueous two phase systems from cyclodextrin polymers and hydrophobically modified acrylic polymers
Aqueous two phase systems from cyclodextrin polymers and hydrophobically modified acrylic polymers
复制标题
由环糊精聚合物和疏水改性丙烯酸聚合物组成的水性两相体系
DOI：
10.1080/01932699808913216
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发表时间：
1998
影响因子：
2.2
通讯作者：
B. Sébille
中科院分区：
文献类型：
--
作者：
N. Gosselet;C. Borie;C. Amiel;B. Sébille
摘要在这项研究中，N，N-二甲基丙烯酰胺和甲基丙烯酸羟乙酯的共聚物的合成和疏水改性与约2摩尔%的金刚烷基团。这种改性共聚物与水溶性β-环糊精聚合物的混合显示了增稠特性。金刚烷基和β-环糊精空腔之间形成包合物是分子间缔合的原因。在给定的总聚合物浓度以上，发生相分离，得到顶部为液相的凝胶相。我们通过对平衡状态下的两相的分析，画出了相图。已经观察到，两种聚合物存在于两相中，并且凝胶相比另一相更浓。这种相行为是一种原始的复凝聚现象，这是由于两种不同的大分子之间的特定吸引相互作用：在两种中性聚合物之间形成包合物。
ABSTRACT In this study, a copolymer of N,N-dimethylacrylamide and hydroxyethyl-methacrylate was synthesized and hydrophobically modified with about 2 mole % of adamantyl groups. The mixing of this modified copolymer with water-soluble β-cyclodextrin polymers reveals thickening properties. Inclusion complexes formation between adamantyl groups and β-cyclodextrin cavities are responsible of intermolecular associations. Above a given total polymer concentration a phase separation occurs, giving a gel phase topped by a liquid phase. We have stated the phase diagram by analysis of the two phases in equilibrium. It has been observed that the two polymers are present in both phases and that the gel phase is more concentrated than the other one. This phase behavior is an original complex coacervation phenomenom which is due to the specific attractive interactions of the two different macromolecules: inclusion complexes formed between the two neutral polymers.