Study of polymer chain morphologies at and around critical concentrations

IF 2.6 4区化学 Q3 POLYMER SCIENCE Journal of Polymer Research Pub Date : 2024-11-12 DOI:10.1007/s10965-024-04194-y

Subrata Mahata, Mojammel H. Mondal

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Abstract

Experimental studies of polymer solutions have been carried out at different scattering angles using Dynamic Light Scattering method to investigate the polymer solutions at and around a few defined concentrations (critical) in terms of their morphological change that results in the homogeneity/heterogeneity of the solutions. Critical concentrations were identified from the study of concentration dependent behavior of polymer solutions as a result of optimum heterogeneity/homogeneity at that concentration. Correlation functions of polymer solutions at critical concentrations were analyzed as a function of pH change of the solutions as well as with the change of different molar concentrations of NaCl solutions. An increase in heterogeneity of the solutions with the change of the pH value or with the change of molar concentrations of NaCl was found to be observed as a result of the increase of stretching exponent of slow mode of the solutions. Additionally, variations of Zeta potential study with pH change and with change of molar concentration of NaCl at different concentrations of polymer solutions show the standard desired equilibrium stability value of the studied solutions.

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临界浓度及其附近聚合物链形态研究

使用动态光散射法在不同散射角对聚合物溶液进行了实验研究，以研究聚合物溶液在几个确定的浓度（临界浓度）及其附近的形态变化，这种变化导致了溶液的均质性/异质性。临界浓度是通过研究聚合物溶液在该浓度下的最佳异质性/均质性而确定的。临界浓度下聚合物溶液的相关函数随溶液 pH 值的变化以及不同摩尔浓度的氯化钠溶液的变化而变化。研究发现，随着溶液 pH 值的变化或 NaCl 溶液摩尔浓度的变化，溶液的异质性会增加，这是因为溶液慢速模式的拉伸指数增加了。此外，在不同浓度的聚合物溶液中，Zeta 电位随 pH 值变化和 NaCl 摩尔浓度变化而变化的研究结果表明，所研究的溶液达到了标准的理想平衡稳定值。

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.