Macromolecular and mechanical changes in aged silicones

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2025-01-22 DOI:10.1016/j.polymdegradstab.2025.111211

Thayri Khaled , Agustín Rios de Anda , Emmanuel Richaud

引用次数: 0

Abstract

Three room temperature-vulcanized PDMS rubbers were thermally aged under air at 250 °C or submitted to aminolysis at room temperature. Ageing was followed by uniaxial tensile testing, sol gel measurements in toluene, and Time Domain Double Quantum NMR characterization. Mechanical tests were exploited to identify the parameters of the Ogden model so as to describe the hyperelastic behavior of PDMS. Sol gel and Double Quantum NMR were used to track and quantify macromolecular changes within the samples. A multiscale correlation between the results of each technique was proposed to highlight the understanding of multiscale analysis in rubber ageing.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.