Journal ArticleDOI
Polyurethane toughened polylactide
Yumin Yuan,Eli Ruckenstein +1 more
TLDR
In this article, the authors investigated the effects of the PU content and its crosslink density on the mechanical properties and the toughness of PU/PLA blends, and showed that a proper amount of PU and a proper extent of cross-link cross-linking can achieve a higher hardness than pure PLA.Abstract:
Brittle polylactide (PLA) was toughened by introducing 5 wt % of a poly(ɛ-caprolactone)(PCL) diol- and triol-based polyurethane (PU) network. The extent of cross-linking of the PU was varied by changing the ratio between diol and triol. The effects of the PU content and its crosslink density on the mechanical properties and the toughness of PU/PLA blends were investigated. Maximum toughness of PU/PLA blends, an order of magnitute higher than that of pure PLA, could be achieved by the use of a proper amount of PU and a proper extent of cross-linking.read more
Citations
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Research progress in toughening modification of poly(lactic acid)
Hongzhi Liu,Jinwen Zhang +1 more
TL;DR: In this article, the recent progress in PLA toughening using various routes including plasticization, copolymerization, and melt blending with flexible polymers, was reviewed in detail.
Journal ArticleDOI
PLA composites: From production to properties
Marius Murariu,Philippe Dubois +1 more
TL;DR: This review highlights recent developments, current results and trends in the field of composites based on PLA, presents the main advances in PLA properties and reports selected results in relation to the preparation and characterization of the most representative PLA composites.
Journal ArticleDOI
Compatibilization in bio-based and biodegradable polymer blends
TL;DR: In this paper, the distinction between degradation and biodegradation of biopolymers is discussed and the importance of their importance for practice is also discussed, as well as several examples of various approaches and their outcome.
Journal ArticleDOI
Poly (lactic acid) blends: Processing, properties and applications.
TL;DR: This article compares the syntheses/processing-morphology-properties interrelationships in PLA-based blends developed so far for various applications and considers favorably for biomedical applications and as the most promising substitute for petroleum-based polymers in a wide range of commodity and engineering applications.
Journal ArticleDOI
Toughening of polylactide by melt blending with linear low‐density polyethylene
Abstract: Melt blending of polylactide and linear low-density polyethylene (LLDPE) was performed in an effort to toughen polylactide. In addition, two model polylactide-polyethylene (PLLA-PE) block copolymers were investigated as compatibilizers. The LLDPE particle size and the impact resistance of binary and ternary blends were measured to determine the extent of compatibilization. For the amorphous polylactide (PLA), toughening was achieved only when a PLLA-PE block copolymer was used as a compatibilizer. For the semicrystalline polylactide (PLLA), toughening was achieved in the absence of block copolymer. To decrease the variability in the impact resistance of the PLLA/LLDPE binary blend, as little as 0.5 wt % of a PLLA–;PE block copolymer was effective. The differences that were seen between the PLA and PLLA binary blends were investigated with adhesion testing. The semicrystalline PLLA did show significantly better adhesion to the LLDPE. We propose that tacticty effects on the entanglement molecular weight or miscibility of polylactide allow for the improved adhesion between the PLLA and LLDPE. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3757–3768, 2003
References
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Journal ArticleDOI
Synthesis of high-molecular-weight poly(l-lactide) initiated with tin 2-ethylhexanoate
TL;DR: In this article, the authors studied the bulk polymerization of L,L-dilactide as a function of polymerization temperature (Tp), time and concentration of catalyst (tin 2-ethylhexanoate).
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