A degradation study of polyamide 11/vermiculite nanocomposites under accelerated UV test

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dc.contributor.author Kaci, Mustapha
dc.contributor.author Dehouche, Nadjet
dc.contributor.author Focke, Walter Wilhelm
dc.contributor.author Van der Merwe, E.M. (Elizabet Margaretha)
dc.date.accessioned 2019-09-10T13:37:36Z
dc.date.issued 2019-12
dc.description.abstract Accelerated photooxidation under ultraviolet (UV) test of polyamide 11 (PA11) films filled with unmodified vermiculite clay at 5 wt% was investigated up to 600 h. Film samples of ~60‐μm thick were prepared by melt compounding using a cast extruder and exposed to UV light irradiation at λ > 295 nm. Fourier transform infrared (FTIR) spectra indicated similar structural changes occurring in both PA11 and PA11/unmodified vermiculite nanoclay (UVMC) nanocomposite along the photooxidation process, resulting in imides and carboxylic acids as the main carbonyl products. It was however observed that the formation rate of carbonyls in the PA11/UVMC nanocomposite was slower than neat PA11. This behavior is consistent with the yellowing index evolution determined by ultraviolet–visible (UV–vis) spectroscopy. Further, the photooxidation stability of the samples was also evaluated by the onset oxidation temperature determined by differential scanning calorimetry. The results indicated a better stability of the nanocomposite film than neat PA11, corroborating well the data obtained by FTIR and UV–vis techniques. en_ZA
dc.description.department Chemical Engineering en_ZA
dc.description.department Chemistry en_ZA
dc.description.embargo 2020-12-01
dc.description.librarian hj2019 en_ZA
dc.description.sponsorship The DGRSDT‐MESRS (Algeria) en_ZA
dc.description.uri https://onlinelibrary.wiley.com/journal/15482634 en_ZA
dc.identifier.citation Kaci, M., Dehouche, N., Focke, W.W. et al. 2019, 'A degradation study of polyamide 11/vermiculite nanocomposites under accelerated UV test', Polymer Engineering and Science, vol. 59, no. 12, pp. 2449-2457. en_ZA
dc.identifier.issn 0032-3888 (print)
dc.identifier.issn 1548-2634 (online)
dc.identifier.other 10.1002/pen.25115
dc.identifier.uri http://hdl.handle.net/2263/71328
dc.language.iso en en_ZA
dc.publisher Wiley en_ZA
dc.rights © 2019 Society of Plastics Engineers. This is the pre-peer reviewed version of the following article : 'A degradation study of polyamide 11/vermiculite nanocomposites under accelerated UV test', Polymer Engineering and Science, vol. 59, no. 12, pp. 2449-2457, 2019. doi : 10.1002/pen.25115. Polymer Engineering and Science has been published in final form at: https://onlinelibrary.wiley.com/journal/15482634. en_ZA
dc.subject Ultraviolet (UV) en_ZA
dc.subject Polyamide 11 (PA11) en_ZA
dc.subject Accelerated photooxidation en_ZA
dc.subject Clay en_ZA
dc.subject Unmodified vermiculite (UMVC) en_ZA
dc.subject Photooxidation en_ZA
dc.subject Vermiculite en_ZA
dc.subject Nanocomposites en_ZA
dc.subject Degradation en_ZA
dc.subject Fourier transform infrared spectroscopy (FTIR) en_ZA
dc.title A degradation study of polyamide 11/vermiculite nanocomposites under accelerated UV test en_ZA
dc.type Postprint Article en_ZA


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