Investigation of the bulk and solution properties for multiblock polyethers

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL Colloid and Polymer Science Pub Date : 2024-06-03 DOI:10.1007/s00396-024-05271-w

Xiaoxia Jiang, Zhiqing Zhang, Xiaoxia Jin, Xiaojie Wang, Yangang Bi, Sukyoung Choi, Fan Dou

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Abstract

Three kinds of multiblock polyethylene oxide-polypropylene oxide (PEOm-PPOn for short) were synthesized using ethylene glycol as the initiated core via the living anionic polymerization. Respectively, the multiblock polyethers were named E340, E540, and E740 based on the block number (3, 5, 7) and the content of ethylene oxide (EO, 40 wt%), which were confirmed by the Fourier transform infrared (FT-IR), hydrogen nuclear magnetic resonance (¹H NMR), and gel permeation chromatography (GPC). Moreover, their bulk and solution properties, including dynamic modulus, rheological characteristic, viscosity, aggregation behavior, surface tension, steady-state fluorescence, solubility, and microemulsion performance were determined. The test results of rheological properties showed that these multiblock copolyethers behaved as the pseudo-plastic non-Newtonian fluids. Furthermore, it was found that their solubility and surface tension were gradually decreased with an increase of block numbers. Nevertheless, the dynamic modulus tended contrary trends. Research on the aggregation and micro-emulsion properties in aqueous solutions indicated that the value of critical micelle concentration (CMC) increased, and meanwhile the ability of solubilization and micro-emulsion formation deteriorated with increasing block numbers. In conclusion, their aggregation mechanism in aqueous solution was also given.

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多嵌段聚醚的体积和溶液特性研究

以乙二醇为引发核，通过活阴离子聚合法合成了三种多嵌段聚环氧乙烷-聚环氧丙烷（简称 PEOm-PPOn）。经傅里叶变换红外光谱（FT-IR）、氢核磁共振（1H NMR）和凝胶渗透色谱法（GPC）确认，这些多嵌段聚醚根据嵌段数目（3、5、7）和环氧乙烷含量（EO，40 wt%）分别命名为 E340、E540 和 E740。此外，还测定了它们的体积和溶液特性，包括动态模量、流变特性、粘度、聚集行为、表面张力、稳态荧光、溶解度和微乳性能。流变特性测试结果表明，这些多嵌段共聚物表现为假塑性非牛顿流体。此外，还发现它们的溶解度和表面张力随着嵌段数的增加而逐渐降低。然而，动态模量却呈现出相反的趋势。对其在水溶液中的聚集和微乳化特性的研究表明，临界胶束浓度（CMC）值随嵌段数的增加而增加，同时溶解能力和微乳化能力随嵌段数的增加而减弱。最后，还给出了它们在水溶液中的聚集机理。

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.