{"id":32083,"date":"2014-03-10T00:10:46","date_gmt":"2014-03-09T22:10:46","guid":{"rendered":"https:\/\/oneearth-oneocean.com\/2014\/03\/10\/accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater\/"},"modified":"2014-03-10T00:10:46","modified_gmt":"2014-03-09T22:10:46","slug":"accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater","status":"publish","type":"post","link":"https:\/\/oneearth-oneocean.com\/en\/research-en\/2014\/accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater\/","title":{"rendered":"Accelerated ageing of polylactide in aqueous environments: Comparative study between distilled water and seawater"},"content":{"rendered":"
Morgan Deroin\u00e9, Antoine Le Duigou, Yves-Marie Corre, Pierre-Yves Le Gac, \nPeter Davies, Guy C\u00e9sar, St\u00e9phane Bruzaud, Accelerated ageing of \npolylactide in aqueous environments: Comparative study between distilled \nwater and seawater, Polymer Degradation and Stability, Available online \n23 January 2014, ISSN 0141-3910, \nhttp:\/\/dx.doi.org\/10.1016\/j.polymdegradstab.2014.01.020<\/a>.\n(http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0141391014000226<\/a>)\nAbstract: Pollution of nature by plastics is a major environmental \nproblem and the challenge for the future is to manage the lifetime of \npolymers better. The aim of this study is to establish a baseline on \ndegradation mechanism and degradation kinetics for lifetime prediction \nof polylactide (PLA) in a marine environment. The ageing of PLA was \naccelerated by raising temperature in distilled water, filtered and \nrenewed seawater and natural seawater. Samples were immersed in \ndistilled water for six months at different temperatures (25, 30, 40 and \n50\u00b0C) in order to evaluate the influence of temperature on PLA \ndegradation kinetics and to predict lifetime. Then, samples were \nimmersed in seawater both in the laboratory and at sea, in order to \ncompare the effects of environment, marine organisms and salt, on \ndegradation. The different degradation steps were followed by \ngravimetry, tensile tests, scanning electron microscopy (SEM), steric \nexclusion chromatography (SEC) and differential scanning calorimetry \n(DSC). In distilled water, accelerated ageing of PLA is complex with \ndeviation from Fickian behaviour at higher temperature. Moreover, \nimmersion in distilled water induces morphological changes, in \nparticular holes, which are absent in seawater at 40\u00b0C for the same \nimmersion time. Indeed, seawater has little impact on the diffusion \nkinetics but affects M\u221e values, which are slightly lower compare to the \ndistilled water uptake.\nKeywords: PLA; accelerated ageing; hydrothermal ageing; degradation<\/pre>\n","protected":false},"excerpt":{"rendered":"
Morgan Deroin\u00e9, Antoine Le Duigou, Yves-Marie Corre, Pierre-Yves Le Gac, Peter Davies, Guy C\u00e9sar, St\u00e9phane Bruzaud, Accelerated ageing of polylactide in aqueous environments: Comparative study between distilled water and seawater, Polymer Degradation and Stability, Available online 23 January 2014, ISSN 0141-3910, http:\/\/dx.doi.org\/10.1016\/j.polymdegradstab.2014.01.020. (http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0141391014000226) Abstract: Pollution of nature by plastics is a major environmental problem and the challenge for the future is to manage the lifetime of polymers better. The aim of this study is to establish a baseline on degradation mechanism and degradation kinetics for lifetime prediction of polylactide (PLA) in a marine environment. The ageing of PLA was accelerated by raising temperature in distilled water, filtered and renewed seawater and natural seawater. Samples were immersed in distilled water for six months at different temperatures (25, 30, 40 and 50\u00b0C) in order to evaluate the influence of temperature on PLA degradation kinetics and to predict lifetime. Then, samples were immersed in seawater both in the laboratory and at sea, in order to compare the effects of environment, marine organisms and salt, on degradation. The different degradation steps were followed by gravimetry, tensile tests, scanning electron microscopy (SEM), steric exclusion chromatography (SEC) and differential scanning calorimetry (DSC). In distilled water, accelerated ageing of PLA is complex with deviation from Fickian behaviour at higher temperature. Moreover, immersion in distilled water induces morphological changes, in particular holes, which are absent in seawater at 40\u00b0C for the same immersion time. Indeed, seawater has little impact on the diffusion kinetics but affects M\u221e values, which are slightly lower compare to the distilled water uptake. Keywords: PLA; accelerated ageing; hydrothermal ageing; degradation<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3504,3423],"tags":[3766,2649,3767,3697],"yoast_head":"\nAccelerated ageing of polylactide in aqueous environments: Comparative study between distilled water and seawater - One Earth - One Ocean e. V.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/oneearth-oneocean.com\/en\/research-en\/2014\/accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Accelerated ageing of polylactide in aqueous environments: Comparative study between distilled water and seawater - One Earth - One Ocean e. V.\" \/>\n<meta property=\"og:description\" content=\"Morgan Deroin\u00e9, Antoine Le Duigou, Yves-Marie Corre, Pierre-Yves Le Gac, Peter Davies, Guy C\u00e9sar, St\u00e9phane Bruzaud, Accelerated ageing of polylactide in aqueous environments: Comparative study between distilled water and seawater, Polymer Degradation and Stability, Available online 23 January 2014, ISSN 0141-3910, http:\/\/dx.doi.org\/10.1016\/j.polymdegradstab.2014.01.020. (http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0141391014000226) Abstract: Pollution of nature by plastics is a major environmental problem and the challenge for the future is to manage the lifetime of polymers better. The aim of this study is to establish a baseline on degradation mechanism and degradation kinetics for lifetime prediction of polylactide (PLA) in a marine environment. The ageing of PLA was accelerated by raising temperature in distilled water, filtered and renewed seawater and natural seawater. Samples were immersed in distilled water for six months at different temperatures (25, 30, 40 and 50\u00b0C) in order to evaluate the influence of temperature on PLA degradation kinetics and to predict lifetime. Then, samples were immersed in seawater both in the laboratory and at sea, in order to compare the effects of environment, marine organisms and salt, on degradation. The different degradation steps were followed by gravimetry, tensile tests, scanning electron microscopy (SEM), steric exclusion chromatography (SEC) and differential scanning calorimetry (DSC). In distilled water, accelerated ageing of PLA is complex with deviation from Fickian behaviour at higher temperature. Moreover, immersion in distilled water induces morphological changes, in particular holes, which are absent in seawater at 40\u00b0C for the same immersion time. Indeed, seawater has little impact on the diffusion kinetics but affects M\u221e values, which are slightly lower compare to the distilled water uptake. Keywords: PLA; accelerated ageing; hydrothermal ageing; degradation\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oneearth-oneocean.com\/en\/research-en\/2014\/accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater\/\" \/>\n<meta property=\"og:site_name\" content=\"One Earth - One Ocean e. 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(http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0141391014000226) Abstract: Pollution of nature by plastics is a major environmental problem and the challenge for the future is to manage the lifetime of polymers better. The aim of this study is to establish a baseline on degradation mechanism and degradation kinetics for lifetime prediction of polylactide (PLA) in a marine environment. The ageing of PLA was accelerated by raising temperature in distilled water, filtered and renewed seawater and natural seawater. Samples were immersed in distilled water for six months at different temperatures (25, 30, 40 and 50\u00b0C) in order to evaluate the influence of temperature on PLA degradation kinetics and to predict lifetime. Then, samples were immersed in seawater both in the laboratory and at sea, in order to compare the effects of environment, marine organisms and salt, on degradation. The different degradation steps were followed by gravimetry, tensile tests, scanning electron microscopy (SEM), steric exclusion chromatography (SEC) and differential scanning calorimetry (DSC). In distilled water, accelerated ageing of PLA is complex with deviation from Fickian behaviour at higher temperature. Moreover, immersion in distilled water induces morphological changes, in particular holes, which are absent in seawater at 40\u00b0C for the same immersion time. Indeed, seawater has little impact on the diffusion kinetics but affects M\u221e values, which are slightly lower compare to the distilled water uptake. Keywords: PLA; accelerated ageing; hydrothermal ageing; degradation","og_url":"https:\/\/oneearth-oneocean.com\/en\/research-en\/2014\/accelerated-ageing-of-polylactide-in-aqueous-environments-comparative-study-between-distilled-water-and-seawater\/","og_site_name":"One Earth - One Ocean e. 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