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The effects of ageing by ultraviolet degradation of recycled polyolefin blends

2006; Elsevier BV; Volume: 91; Issue: 12 Linguagem: Inglês

10.1016/j.polymdegradstab.2006.04.025

1873-2321

J.P. Attwood, Mathew Philip, A. J. Hulme, G. Williams, Paul David Shipton,

Material Properties and Processing

Products manufactured from recycled polyolefin blends were subjected to accelerate weathering conditions and subsequent tests. Field-aged products were also tested. Samples were analysed for changes in mechanical, rheological and chemical properties. Data obtained in this study, by means of tensile, impact, and melt flow tests, GPC, gloss and colour analyses showed that the effect of UV exposure, whether in the field or artificial environments, was not significant as far as the mechanical properties of the materials were concerned. There was some change in the surface characteristics but such surface effects would not compromise the mechanical integrity of the product when recycled. During reprocessing of the materials, it is likely that stabilizer is redistributed at the surface of any new moulding, thus renewing the surface characteristics. Hence damaged or end-of-life products need not be discounted from recycling.