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Study of the degradation profile for virgin linear low-density polyethylene (LLDPE) and polyolefin (PO) plastic waste blends

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Abstract

In this study, the properties of virgin linear low-density polyethylene (LLDPE) and its blends with reclaimed plastic solid waste (PSW) are investigated by thermogravimetry, differential scanning calorimetry (DSC), infrared spectroscopy and scanning electron microscopy (SEM). The PSW constituted polyolefin (PO) polymers recycled mechanically via extrusion/blown-film and exposed to accelerated weathering tests to determine the change in their degradation behaviour. The oxidation products determined using the FTIR analysis and thermal stability studies points toward the blend constituting 25% of waste by weight as the most stable. Changes in crystallinity of the polymers were attributed to the crystal size change as a consequence of the weathering mechanism. The DSC results revealed that both oxidation induction temperature (OIT) and crystallinity were affected by the PO waste content. This points towards the impact of polymers immiscibility and polydispersity within the matrix of the blends due to chain scission reaction and oxidation with the UV exposure.

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Adapted from Al-Salem [59]

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Authors and Affiliations

  1. Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, P.O. Box: 24885, Safat, 13109, Kuwait

    S. M. Al-Salem, M. H. Behbehani, F. Asiri, S. F. Al-Rowaih & H. Karam

  2. Energy & Building Research Centre, Kuwait Institute for Scientific Research, P.O. Box: 24885, Safat, 13109, Kuwait

    A. Al-Hazza’a & A. A. Al-Rowaih

  3. Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, UK

    J. C. Arnold & S. M. Alston

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  1. S. M. Al-Salem
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Al-Salem, S.M., Behbehani, M.H., Al-Hazza’a, A. et al. Study of the degradation profile for virgin linear low-density polyethylene (LLDPE) and polyolefin (PO) plastic waste blends. J Mater Cycles Waste Manag 21, 1106–1122 (2019). https://doi.org/10.1007/s10163-019-00868-8

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