Journal
POLYMER DEGRADATION AND STABILITY
Volume 95, Issue 4, Pages 527-535Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.12.021
Keywords
Photo-oxidation behaviour; Nanocomposite polymer blends; Microstructure; Mechanical properties
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Funding
- University of Palermo [ORPA07XR52]
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The impact of small amounts of organomodified clay (OMMT) on the photo-degradation behaviour of two blends obtained by mixing either low-density polyethylene (LDPE) or high density polyethylene (HDPE) with polyamide 6 (PA6) (LDPE/PA6 and HDPE/PA6 75/25 wt-%) Was Studied. The complex photodegradation behaviour Was followed by monitoring the main physical-mechanical properties of the blends. In particular, mechanical and spectroscopic tests were performed in conditions of accelerated artificial aging. An accurate mechanical and morphological characterization was previously carried Out. The presence of the OMMT promotes the unexpected formation of a co-continuous morphology for the HDPE/PA6 blend without significantly improving the interfacial adhesion. Differently, the OMMT-filled LDPE/PA6 blend exhibits a finely distributed morphology, and some apparent improvement of the interfacial adhesion was noticed. Probably due to these differences in Microstructure. a different impact of the nanoparticles on the photo-resistance behaviours was observed for the two families of samples. In particular, the HDPE-based nanocomposite blend exhibits an improved photo-resistance, while the opposite occurs for the LDPE-based system. Published by Elsevier Ltd.
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