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

Kaci, Mustapha; Dehouche, Nadjet; Focke, Walter Wilhelm; Van der Merwe, Elizabet Margaretha

dc.contributor.author	Kaci, Mustapha
dc.contributor.author	Dehouche, Nadjet
dc.contributor.author	Focke, Walter Wilhelm
dc.contributor.author	Van der Merwe, 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