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Open AccessArticle

Nonisothermal Crystallization Kinetics of Polylactic Acid under the Influence of Polyolefin Elastomers

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Department of Mechanical Engineering, Semnan University, Semnan 35131, Iran
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Petrochemical Research and Technology Company (NPC-rt), National Petrochemical Company (NPC), Tehran P.O. Box 14358-84711, Iran
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Department of Materials Research and Technology (MRT), Luxembourg Institute of Science and Technology (LIST), 5 Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
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Université de Lorraine, CentraleSupélec, LMOPS, F-57000 Metz, France
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Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran P.O. Box 14965/115, Iran
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Department of Resin and Additives, Institute for Color Science and Technology, Tehran P.O. Box 16765-654, Iran
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Authors to whom correspondence should be addressed.
J. Compos. Sci. 2020, 4(2), 65; https://doi.org/10.3390/jcs4020065
Received: 15 April 2020 / Revised: 10 May 2020 / Accepted: 29 May 2020 / Published: 2 June 2020
(This article belongs to the Special Issue Progress in Rubber Blends and Composites Technology)
Crystallization kinetics of various blends of poly(lactic acid) (PLA)/polyolefin elastomer (POE) was studied through nonisothermal experimental investigations and theoretical approaches. The PLA/POE blends were prepared in a melt mixing process by using two types of POEs and compatibilizers. The rubber phases used were adopted on the basis of polyethylene (PE) and polypropylene (PP) type olefin elastomers. The effects of two kinds of compatibilizers containing ethylene vinyl acetate copolymer (EVA) and ethylene acrylic ester-glycidyl methacrylate terpolymer (EGMA) on the morphology and various parameters of crystallization of PLA were investigated using scanning electron microscopy (SEM) and differential scanning calorimeter (DSC) measurements, respectively. The morphology investigations on PLA blends containing PP based olefin elastomers showed that the introduction of EGMA compatibilizer into the matrix led to a more than 100% reduction in the size of the rubber droplets. The experimental measurements of crystallization behavior of various PLA/POE blends showed that the POEs and compatibilizers could cause a fall in the initial crystallization temperature more than 13 °C. The theoretical approaches used for studying the kinetics of crystallization of PLA in the presence of various POEs and compatibilizers indicated a decrease in the crystallinity of PLA and a 64% reduction in the activation energy compared to the neat PLA. The results suggest that the largest variation in the crystallization kinetic parameters of PLA was resulted from the PP based olefin elastomer and EGMA compatibilizer. View Full-Text
Keywords: crystallization kinetics; poly(lactic acid) (PLA); polyolefin elastomer (POE); compatibilizer; morphology crystallization kinetics; poly(lactic acid) (PLA); polyolefin elastomer (POE); compatibilizer; morphology
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Khosravi, A.; Fereidoon, A.; Khorasani, M.M.; Berthe, V.; Vahabi, H.; Paran, S.M.R.; Naderi, G.; Saeb, M.R. Nonisothermal Crystallization Kinetics of Polylactic Acid under the Influence of Polyolefin Elastomers. J. Compos. Sci. 2020, 4, 65.

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