Colloid-Chemical and Rheological Properties of Interfacial Adsorption Layers Formed by Water-Soluble and Poorly Soluble Block Copolymers of Ethylene Oxide and Propylene Oxide

IF 0.7 4区化学 Q4 CHEMISTRY, PHYSICAL Russian Journal of Physical Chemistry A Pub Date : 2025-01-17 DOI:10.1134/S003602442470242X

I. A. Gritskova, I. D. Kovtun, G. A. Romanenko, A. M. Shulgin, S. M. Levachev, A. E. Kharlov, S. N. Chvalun

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Abstract

The colloid-chemical properties of water-soluble and poorly soluble poly(ethylene oxide) and poly(propylene oxide) block copolymers (pluronics), as well as the rheological properties of interfacial adsorption layers (IALs) formed by them and the polymer generated during polymerization initiation on the particle surface, were studied. The temperature, surfactant concentration, and polymer effects on the effective elastic modulus, determined during the lateral deformation of IALs, were evaluated. The strongest interfacial layers are formed by the poorly water-soluble pluronic, which contains a hydrophilic polyoxyethylene block surrounded by two hydrophobic polyoxypropylene blocks. The high strength of the interfacial adsorption layer on the particle surface affords polymer suspensions with high (up to 33%) polymer contents and narrow particle size distributions.

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环氧乙烷和环氧丙烷水溶性和难溶嵌段共聚物界面吸附层的胶体化学和流变性能

研究了水溶性和难溶性聚环氧乙烷和聚环氧丙烷嵌段共聚物（pluronics）的胶体化学性质，以及它们形成的界面吸附层（als）和聚合引发时在颗粒表面生成的聚合物的流变性能。研究了温度、表面活性剂浓度和聚合物对材料横向变形过程中有效弹性模量的影响。最强的界面层是由水溶性差的pluronic形成的，它包含一个亲水的聚氧乙烯块，周围是两个疏水的聚氧丙烯块。颗粒表面的界面吸附层的高强度提供了聚合物悬浮液的高（高达33%）聚合物含量和窄粒度分布。

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来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.