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Materials 2016, 9(5), 313; doi:10.3390/ma9050313

Poly(lactide)-g-poly(butylene succinate-co-adipate) with High Crystallization Capacity and Migration Resistance

Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Author to whom correspondence should be addressed.
Academic Editors: Marek M. Kowalczuk and Guozhan Jiang
Received: 12 February 2016 / Revised: 12 April 2016 / Accepted: 19 April 2016 / Published: 27 April 2016
(This article belongs to the Special Issue Biodegradable and Bio-Based Polymers)
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Abstract

Plasticized polylactide (PLA) with increased crystallization ability and prolonged life-span in practical applications due to the minimal plasticizer migration was prepared. Branched plasticized PLA was successfully obtained by coupling poly(butylene succinate-co-adipate) (PBSA) to crotonic acid (CA) functionalized PLA. The plasticization behavior of PBSA coupled PLA (PLA-CA-PBSA) and its counterpart PBSA blended PLA (PLA/PBSA) were fully elucidated. For both PLA-CA-PBSA and PLA/PBSA, a decrease of Tg to around room temperature and an increase in the elongation at break of PLA from 14% to 165% and 460%, respectively, were determined. The crystallinity was increased from 2.1% to 8.4% for PLA/PBSA and even more, to 10.6%, for PLA-CA-PBSA. Due to the inherent poor miscibility between the PBSA and PLA, phase separation occurred in the blend, while PLA-CA-PBSA showed no phase separation which, together with the higher crystallinity, led to better oxygen barrier properties compared to neat PLA and PLA/PBSA. A higher resistance to migration during hydrolytic degradation for the PLA-CA-PBSA compared to the PLA/PBSA indicated that the plasticization effect of PBSA in the coupled material would be retained for a longer time period. View Full-Text
Keywords: polylactide; poly(butylene succinate-co-adipate); plasticizing; crystallization; oxygen permeability; migration resistance polylactide; poly(butylene succinate-co-adipate); plasticizing; crystallization; oxygen permeability; migration resistance
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MDPI and ACS Style

Yang, X.; Xu, H.; Odelius, K.; Hakkarainen, M. Poly(lactide)-g-poly(butylene succinate-co-adipate) with High Crystallization Capacity and Migration Resistance. Materials 2016, 9, 313.

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