The Effect of Tinuvin Derivatives as an Ultraviolet (UV) Stabilizer on EPDM Rubber

Sibel Dikmen Kucuk, Husnu Gerengi, Yusuf Guner

Abstract


Ethylene-propylene-diene monomer (EPDM) is one of the most widely used synthetic rubbers, especially in the automotive industry. Despite its many benefits, the chief weakness of EPDM has been the color change occurring in its products due to ultraviolet (UV) rays. It is recognized that UV energy causes the dissociation of bonds (mostly C-C and C-H) in EPDM materials as well as cracks and color changes on the surface. The aim of this study was to investigate the effect of the Tinuvin derivatives widely used as UV stabilizers in the plastics industry on EPDM rubber. The EPDM rubber plates were prepared by adding Tinuvin-P, Tinuvin-213 and Tinuvin-234 as UV absorbers (UVAs) and Tinuvin-123 as hindered amine light stabilizer (HALS) material at a ratio of 1.0 phr (parts per hundred parts of rubber) to an available EPDM formula. The effects of the Tinuvin derivatives were investigated by the internationally recognized Florida outdoor aging test. The surfaces of the EPDM plates were visually scrutinized and surface morphological changes were examined via scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and Fourier transform infrared (FTIR) spectrometry analyses. The results obtained showed that, unlike in the plastic industry, not all Tinuvin derivatives could be used as UV stabilizers for EPDM products. Of all the tested Tinuvin derivatives, the Tinuvin-123 compound was the most effective, indicating it to be suitable for use as a protective UV stabilizer for EPDM rubber applications.

Keywords


EPDM; UV Stabilizers; Tinuvin

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References


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S. Kucuk, H. Gerengi and Y. Guner, “Effect of ultraviolet (uv) stabilizers on rubber-based automotive sealing profiles,” 4th International Symposium on Innovative Technologies in Engineering and Science, Alanya, Turkey, 3-5 November 2016.




DOI: http://dx.doi.org/10.21533/pen.v6i1.157

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Copyright (c) 2018 Sibel Dikmen Kucuk, Husnu Gerengi, Yusuf Guner

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ISSN: 2303-4521

Digital Object Identifier DOI: 10.21533/pen

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License