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https://doi.org/10.21256/zhaw-1553Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Badertscher, Remo | - |
| dc.contributor.author | Lerf, Reto | - |
| dc.contributor.author | Delfosse, Daniel | - |
| dc.contributor.author | Adlhart, Christian | - |
| dc.date.accessioned | 2018-01-17T10:28:55Z | - |
| dc.date.available | 2018-01-17T10:28:55Z | - |
| dc.date.issued | 2012-11 | - |
| dc.identifier.issn | 0141-3910 | de_CH |
| dc.identifier.uri | https://digitalcollection.zhaw.ch/handle/11475/2079 | - |
| dc.description.abstract | Today, UHMWPE implants are stabilized with α-tocopherol and cross-linked by irradiation in order to reduce wear. Little is known about the structural transformation of the antioxidant α-tocopherol upon irradiation. In the present investigation, the major irradiation reaction products of α-tocopherol dissolved at 0.1 wt.% in liquid model hydrocarbons were characterized spectroscopically and by independent synthesis. We observed only a single product group, namely phenolic alkyl ethers formed by radical recombination of a phenoxyl radical with a secondary alkyl radical. The irradiation dose is the parameter which controls the amount of consumption of α-tocopherol. At a dose of 27.5 kGy, 31-34% of α-tocopherol was transformed into the corresponding ether, while at 97.9 kGy, the degree of transformation was 68-76%. The observed ether formation in the liquid model hydrocarbons explains two significant observations for the α-tocopherol stabilized polymers, namely depletion of the α-tocopherol’s phenol group upon irradiation and “grafting”, i.e. formation of a chemical bond between the polymer and its antioxidant. | de_CH |
| dc.language.iso | en | de_CH |
| dc.publisher | Elsevier | de_CH |
| dc.relation.ispartof | Polymer Degradation and Stability | de_CH |
| dc.rights | Licence according to publishing contract | de_CH |
| dc.subject | Gamma irradiation | de_CH |
| dc.subject | Antioxidant | de_CH |
| dc.subject | Mechanism | de_CH |
| dc.subject | Vitamin E | de_CH |
| dc.subject.ddc | 540: Chemie | de_CH |
| dc.subject.ddc | 620: Ingenieurwesen | de_CH |
| dc.title | Grafting of α-tocopherol upon γ-irradiation in UHMWPE probed by model hydrocarbons | de_CH |
| dc.type | Beitrag in wissenschaftlicher Zeitschrift | de_CH |
| dcterms.type | Text | de_CH |
| zhaw.departement | Life Sciences und Facility Management | de_CH |
| zhaw.organisationalunit | Institut für Chemie und Biotechnologie (ICBT) | de_CH |
| zhaw.publisher.place | Amsterdam | de_CH |
| dc.identifier.doi | 10.21256/zhaw-1553 | - |
| dc.identifier.doi | 10.1016/j.polymdegradstab.2012.07.040 | de_CH |
| zhaw.funding.eu | No | de_CH |
| zhaw.issue | 11 | de_CH |
| zhaw.originated.zhaw | Yes | de_CH |
| zhaw.pages.end | 2261 | de_CH |
| zhaw.pages.start | 2255 | de_CH |
| zhaw.publication.status | publishedVersion | de_CH |
| zhaw.volume | 97 | de_CH |
| zhaw.publication.review | Peer review (Publikation) | de_CH |
| Appears in collections: | Publikationen Life Sciences und Facility Management | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2012_Adlhart_Grafting_of_Tocopherol_upon_Irradiation_Polymer_Degradation_and_Stability.pdf | 282.27 kB | Adobe PDF |  View/Open |
Show simple item record
Badertscher, R., Lerf, R., Delfosse, D., & Adlhart, C. (2012). Grafting of α-tocopherol upon γ-irradiation in UHMWPE probed by model hydrocarbons. Polymer Degradation and Stability, 97(11), 2255–2261. https://doi.org/10.21256/zhaw-1553
Badertscher, R. et al. (2012) ‘Grafting of α-tocopherol upon γ-irradiation in UHMWPE probed by model hydrocarbons’, Polymer Degradation and Stability, 97(11), pp. 2255–2261. Available at: https://doi.org/10.21256/zhaw-1553.
R. Badertscher, R. Lerf, D. Delfosse, and C. Adlhart, “Grafting of α-tocopherol upon γ-irradiation in UHMWPE probed by model hydrocarbons,” Polymer Degradation and Stability, vol. 97, no. 11, pp. 2255–2261, Nov. 2012, doi: 10.21256/zhaw-1553.
BADERTSCHER, Remo, Reto LERF, Daniel DELFOSSE und Christian ADLHART, 2012. Grafting of α-tocopherol upon γ-irradiation in UHMWPE probed by model hydrocarbons. Polymer Degradation and Stability. November 2012. Bd. 97, Nr. 11, S. 2255–2261. DOI 10.21256/zhaw-1553
Badertscher, Remo, Reto Lerf, Daniel Delfosse, and Christian Adlhart. 2012. “Grafting of α-Tocopherol upon γ-Irradiation in UHMWPE Probed by Model Hydrocarbons.” Polymer Degradation and Stability 97 (11): 2255–61. https://doi.org/10.21256/zhaw-1553.
Badertscher, Remo, et al. “Grafting of α-Tocopherol upon γ-Irradiation in UHMWPE Probed by Model Hydrocarbons.” Polymer Degradation and Stability, vol. 97, no. 11, Nov. 2012, pp. 2255–61, https://doi.org/10.21256/zhaw-1553.
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