Iritz, Márton (2019) Accelerated degradation of elastomers - Effects of chemical degradation on mechanical properties and lifetime of LSR and TPV. Master's Thesis / Essay, Chemical Engineering.
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Abstract
Two different elastomers, a liquid silicone rubber from “COMPUNDER1” and a thermoplastic vulcanizate from “COMPOUNDER2”, were aged for 90 days at three temperatures (20, 40, 60 °C) in different surface disinfectants commonly used in healthcare. These disinfectants were sodium hypochlorite solution, isopropyl alcohol, DISINF1, containing peroxiacetic acid and DISINF2, containing a quaternary amine. The degradation of the two materials were followed by mechanical (weight change, hardness, compression set, stress-strain testing), analytical (FT-IR) and thermal measurements (TGA). The experiment aimed to point out the most significant effects of material degradation and to streamline the testing of elastomer ageing at Philips. Thermogravimetric analysis was used to assess the acceleration effect of these disinfectants on the useful lifetime of the materials. The ageing of the materials resulted in a two stage degradation, one controlled by chemical reactions and one reliant on mass transfer phenomena. It was shown that in the 90-day observation period, the mass transfer limitations prevail.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Picchioni, F. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 22 May 2019 |
| Last Modified: | 17 Jun 2019 07:33 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/19515 |
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