Hamieh Tayssir
Faculty of Science and Engineering, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
Institut de Science des Matériaux de Mulhouse, Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France.
Polymers (Basel). 2024 Nov 21;16(23):3233. doi: 10.3390/polym16233233.
The dispersive and polar properties of materials, and especially of polymers and copolymers, play an important role in several engineering applications implying their surfaces and interfaces. The surface energetic properties of poly(styrene-co-butadiene) have never been studied. We proposed in this study an accurate determination of such properties by using inverse gas chromatography (IGC) at infinite dilution.
The IGC surface technique led to the dispersive and polar properties of poly(styrene-co-butadiene) rubber (SBR) by adsorption of organic solvents at various temperatures.
Our new methodology, based on the thermal Hamieh model and the London dispersion interaction energy, was used to determine the London dispersion surface energy, the polar acid-base surface energy, and the Lewis acid-base properties of the copolymer.
The different surface energy parameters of the SBR were obtained as a function of temperature from the chromatographic measurements.
The dispersive and polar free energies of adsorption of the various n-alkanes and polar molecules on poly(styrene-co-butadiene) were determined at different temperatures. A decrease in the London dispersive surface energy and the polar Lewis acid-base surface energies of SBR was highlighted when the temperature increased. It showed a Lewis amphoteric character of poly(styrene-co-butadiene) with a highest basic constant 10 times larger than its acidic constant. This new and original method can better characterize the surface thermodynamic properties of poly(styrene-co-butadiene).
材料的分散性和极性特性，尤其是聚合物和共聚物的此类特性，在涉及它们表面和界面的多种工程应用中发挥着重要作用。聚（苯乙烯 - 共丁二烯）的表面能性质从未被研究过。在本研究中，我们提出通过无限稀释反相气相色谱法（IGC）准确测定此类性质。
IGC表面技术通过在不同温度下吸附有机溶剂得出聚（苯乙烯 - 共丁二烯）橡胶（SBR）的分散性和极性特性。
我们基于热哈米耶模型和伦敦色散相互作用能的新方法，用于测定该共聚物的伦敦色散表面能、极性酸碱表面能以及路易斯酸碱性质。
通过色谱测量获得了SBR不同表面能参数随温度的变化情况。
测定了不同温度下各种正构烷烃和极性分子在聚（苯乙烯 - 共丁二烯）上的分散性和极性吸附自由能。温度升高时，SBR的伦敦色散表面能和极性路易斯酸碱表面能降低。结果表明聚（苯乙烯 - 共丁二烯）具有路易斯两性特征，其最高碱性常数比酸性常数大10倍。这种新颖的方法能够更好地表征聚（苯乙烯 - 共丁二烯）的表面热力学性质。
