{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T02:52:40Z","timestamp":1774320760295,"version":"3.50.1"},"reference-count":41,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2021,5,26]],"date-time":"2021-05-26T00:00:00Z","timestamp":1621987200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Membranes"],"abstract":"<jats:p>High-density polyethylene (HDPE) geomembranes are polymeric geosynthetic materials usually applied as a liner in environmental facilities due to their good mechanical properties, good welding conditions, and excellent chemical resistance. A geomembrane\u2019s field performance is affected by different conditions and exposures, including ultraviolet radiation, thermal and oxidative exposure, and chemical contact. This article presents an experimental study with a 1.0 mm-thick HDPE virgin geomembrane exposed by the Xenon arc weatherometer for 2160 h and the ultraviolet fluorescent weatherometer for 8760 h to understand the geomembrane\u2019s behavior under ultraviolet exposure. The evaluation was performed using the melt flow index (MFI) test, oxidative-induction time (OIT) tests, tensile test, differential scanning calorimetry (DSC) analysis, and Fourier transform infrared spectroscopy (FTIR) analysis. The sample exposed in the Xenon arc equipment showed a tendency to increase the MFI values during the exposure time. This upward trend may indicate morphological changes in the polymer. The tensile behavior analysis showed a tendency of the sample to lose ductility, without showing brittle behavior. The samples\u2019 OIT test results under both device exposures showed faster antioxidant depletion for the standard OIT test than the high-pressure OIT test. The DSC and FTIR analyses did not demonstrate the polymer\u2019s changes.<\/jats:p>","DOI":"10.3390\/membranes11060390","type":"journal-article","created":{"date-parts":[[2021,5,26]],"date-time":"2021-05-26T21:56:44Z","timestamp":1622066204000},"page":"390","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Laboratory Study of the Ultraviolet Radiation Effect on an HDPE Geomembrane"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1242-3708","authenticated-orcid":false,"given":"Fernando Luiz","family":"Lavoie","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Mau\u00e1 Institute of Technology, S\u00e3o Caetano do Sul 09580-900, Brazil"},{"name":"S\u00e3o Carlos School of Engineering, University of S\u00e3o Paulo\u2014USP, S\u00e3o Paulo 13566-590, Brazil"}]},{"given":"Marcelo","family":"Kobelnik","sequence":"additional","affiliation":[{"name":"S\u00e3o Carlos School of Engineering, University of S\u00e3o Paulo\u2014USP, S\u00e3o Paulo 13566-590, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2887-2834","authenticated-orcid":false,"given":"Clever Aparecido","family":"Valentin","sequence":"additional","affiliation":[{"name":"S\u00e3o Carlos School of Engineering, University of S\u00e3o Paulo\u2014USP, S\u00e3o Paulo 13566-590, Brazil"}]},{"given":"\u00c9rica Fernanda da Silva","family":"Tirelli","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Mau\u00e1 Institute of Technology, S\u00e3o Caetano do Sul 09580-900, Brazil"}]},{"given":"Maria de Lurdes","family":"Lopes","sequence":"additional","affiliation":[{"name":"CONSTRUCT-GEO, Department of Civil Engineering, University of Porto, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2226-4950","authenticated-orcid":false,"given":"Jefferson Lins da","family":"Silva","sequence":"additional","affiliation":[{"name":"S\u00e3o Carlos School of Engineering, University of S\u00e3o Paulo\u2014USP, S\u00e3o Paulo 13566-590, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,26]]},"reference":[{"key":"ref_1","unstructured":"Koerner, R.M. 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