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http://dx.doi.org/10.25673/109412
Titel: | Peroxide-based crosslinking of solid silicone rubber, part II : the counter-intuitive influence of dicumylperoxide concentration on crosslink effectiveness and related network structure |
Autor(en): | Azevedo, M. Monks, A.-M. Kerschbaumer, R. C. Schlögl, Stefan Saalwächter, Kay Walluch, M. Consolati, Giovanni Holzer, C. |
Erscheinungsdatum: | 2023 |
Art: | Artikel |
Sprache: | Englisch |
Zusammenfassung: | Application of elastomers in general demands the conversion of their soluble networks into crosslinked structures. This abrupt change causes several modifications, both in the atomic/molecular level and at the macro-scale. In this study, solid silicone rubber (high molecular weight poly(dimethylsiloxane)), was crosslinked with dicumylperoxide (DCP), a widely used crosslinking agent by the rubber industry. The changes caused by different DCP concentrations were investigated, aiming to bring attention to the molecular transformations, usually neglected when processing-oriented studies are conducted. DCP concentration showed a limited contribution to the network's molecular dynamics, which was found to be mainly dominated by entanglements. The dominance of entanglements over other molecular constraints, like crosslink points, justifies the threshold and counter-intuitive behavior of tensile and hardness properties. However, differences were found in the crystallization ability after crosslinking, when the more crosslink points were introduced, the lower the crystallinity was and the less stable the PDMS crystallites were. In addition to providing a deeper understanding of an industrially applied rubber system n terms of the effective concentration of DCP, and the reasoning behind such concentration, the findings of this study add to the state-of-the-art comprehension of elastomeric networks, and how they behave on a molecular level. |
URI: | https://opendata.uni-halle.de//handle/1981185920/111367 http://dx.doi.org/10.25673/109412 |
Open-Access: | Open-Access-Publikation |
Nutzungslizenz: | (CC BY 4.0) Creative Commons Namensnennung 4.0 International |
Journal Titel: | Journal of applied polymer science |
Verlag: | Wiley |
Verlagsort: | New York, NY [u.a.] |
Band: | 140 |
Heft: | 31 |
Originalveröffentlichung: | 10.1002/app.54111 |
Seitenanfang: | 1 |
Seitenende: | 17 |
Enthalten in den Sammlungen: | Open Access Publikationen der MLU |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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J of Applied Polymer Sci - 2023 - Azevedo - Peroxide‐based crosslinking of solid silicone rubber part II The.pdf | 2.81 MB | Adobe PDF | Öffnen/Anzeigen |