Diffusion of organic solvents in thermoplastic elastomers: infinite dilution experiments

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-11-06 DOI:10.1007/s00289-024-05545-x

Ayşegül Aşkın, Sevilay Altınbaş, Marco Giacinti Baschetti

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Abstract

Diffusion parameters, activity coefficients, and Flory–Huggins interaction parameters of n-hexane, cyclohexane, and benzene in several styrene-diene block copolymers (styrene–butadiene–styrene (SBS), styrene–ethylene/butylene–styrene (SEBS), and styrene–isoprene–styrene (SIS)) were obtained using the inverse gas chromatography (IGC) method with a packed column in the infinite dilution region and the range of 40–70 °C. Diffusion coefficients based on the change in chromatographic peak width with carrier gas flow rate were calculated using the Van Deemter equation. The strong linear relationship indicated that using the Van Deemter equation was appropriate. The temperature increase caused the infinite dilution diffusion coefficient to increase, while the infinite dilution activity coefficient decreased; this proved the different behavior of the kinetics and thermodynamic parameters as a function of temperature. All solutes' infinite dilution diffusion coefficients decreased going from SBS to SEBS with the following order: SBS > SIS > SEBS. Activation energies were calculated from the Arrhenius equation, which provides the temperature dependence of diffusion coefficients.

Graphical abstract

Chromatograms for SBS-Cyclohexane system at different carrier gas flow rate (Tc = 60 °C).

Abstract Image

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."