Study on the Interaction between Solvent and Tire Rubber Particles: Aging Variables in Microplastic Storage and Analysis

Research Background and Core Issues

Tire rubber particles, as one of the important sources of microplastics in the environment, have their aging status and reliability of analysis results affected by sample storage and pre-treatment processes. The study titled ‘Solve car tire rubber interactions in microplastic storage and analysis’ was published in Volume 255 of Polymer Degradation and Stability Alexander Schmiedhofer、Valentin Buchner、Vasiliki-Maria Archodoulaki、Carsten Gachot Collaborated with Martin Nastran to investigate the interaction between solvents and tire rubber particles in the context of microplastic storage and analysis.

The factual dimension of research focus

The core object of this study is the interaction between tire rubber particles and solvents.

. Tire rubber itself is a highly cross-linked and complex elastomer system, which includes various components such as rubber matrix, fillers, processing aids, and residual sulfurization system. When such particles come into contact with solvents during the analysis process, the solvents may affect the surface and internal soluble components of the particles, thereby affecting the morphology, composition characterization results, and even the comparability of subsequent analysis data. The study links this issue to the storage conditions of microplastics. Microplastic samples often go through storage stages from collection to analysis, and factors such as storage medium, time, and temperature may alter the physical and chemical state of the samples. For particles derived from tire rubber, this change not only involves the integrity of the particles themselves, but may also involve the migration and loss of additive components, thereby interfering with the detection results.

Significance in the field of polymer aging and stabilization

From the perspective of polymer aging, the degradation process of tire rubber particles in the environment is closely related to the behavior of the stabilization system.

. Rubber formulations typically contain antioxidant systems and protective components to inhibit thermal oxidative aging and ozone erosion; Under outdoor exposure conditions, weather resistant and stable designs may also introduce light stable components such as HALS and UVA, or achieve synergistic protection through complex systems. The consumption, migration, and transformation of these components during particle aging determine the path and rate of material performance degradation. This study suggests that solvent contact may alter the distribution of migratory components in rubber particles during the storage and analysis of microplastic samples. For practitioners engaged in research on aging mechanisms and development of stable formulations, this means that when evaluating the degree of aging of tire rubber or similar elastomer materials, attention needs to be paid to whether sample pretreatment introduces additional extraction or migration effects. If the solvent has a significant effect on the additive in the analysis process, the residual amount of the antioxidant system or the content of the photostable component detected may deviate from the actual state of the material, thereby affecting the judgment of the weather stability performance.

Inspiration from detection and characterization

In the practice of detection and characterization, the composition analysis of tire rubber particles often involves steps such as solvent extraction, chromatographic separation, and spectral identification.

. This study proposes the interaction between solvents and rubber particles as an independent variable, which helps method developers evaluate the applicability of solvent selection when establishing microplastic analysis processes and reduce the disturbance of aging state information in the pre-processing stage. This perspective has direct methodological value for research scenarios that require distinguishing between “additive consumption caused by environmental aging” and “additive loss caused by analytical processes”. Overall, this study did not directly provide a conclusion on stabilizing the formula, but rather revealed the solvent rubber interaction, a variable that is easily overlooked, from the methodological perspective of sample storage and analysis. For the field of polymer aging and stabilization technology, this constitutes a fundamental suggestion worth considering in experimental design: the reliability of aging data also depends on every contact link of the sample in the analysis chain.

Information source:Solvent-car tire rubber interactions in microplastic storage and analysis， Organized by Herun Chemical.