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Plasticization of poly(lactide) with blends of tributyl citrate and low molecular weight poly(D,L-lactide)-b-poly(ethylene glycol) copolymers

(2009) EUROPEAN POLYMER JOURNAL. 45(10). p.2839-2848
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Abstract
Polylactide (PLA) is a potential candidate for the partial replacement of petrochemical polymers because it is biodegradable and produced from annually renewable resources. Characterized by its high tensile strength, unfortunately the brittleness and rigidity limit its applicability. For a great number of applications such as packaging, fibers, films, etc., it is of high interest to formulate new PLA grades with improved flexibility and better impact properties. In order to develop PLA-based biodegradable packaging, the physico-mechanical properties of commercially available PLA should be modified using biodegradable plasticizers. To this end, PLA was melt-mixed with blends of tributyl citrate and more thermally stable low molecular weight block copolymers based on poly(d,l-lactide) and poly(ethylene glycol) of different molecular weights and topologies. The copolymers have been synthesized using a potassium based catalyst which is expected to be non toxic and were characterized by utilization of TGA, GPC and NMR techniques. The effect of the addition of up to 25 wt% plasticizer on the thermo-mechanical properties of PLA was investigated and the results were correlated with particular attention to the relationship between properties and applications. To confirm the safety of the catalyst used for the preparation of the copolymers, in vitro cytotoxicity tests have been carried out using MTS assay and the results show their biocompatibility in the presence of the fibroblast cells. Compost biodegradation experiments carried out using neat and plasticized PLA have shown that the presence of plasticizers accelerates the degradation of the PLA matrix.
Keywords
PHYSICAL-PROPERTIES, PACKAGING MATERIALS, POLY(L-LACTIC ACID), POLY(ETHYLENE GLYCOL), MECHANICAL-PROPERTIES, BARRIER PROPERTIES, PHASE-SEPARATION, POLYLACTIC ACID, MISCIBILITY, Biodegradable polymers, Poly(lactide), Plasticization, Thermo-mechanical properties, Packaging, Compost degradation, CONTROLLED DRUG-DELIVERY

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Citation

Please use this url to cite or link to this publication:

Chicago
Lemmouchi, Yahia, Marius Murariu, Ana Margarida Dos Santos, Allan J Amass, Etienne Schacht, and Philipe Dubois. 2009. “Plasticization of Poly(lactide) with Blends of Tributyl Citrate and Low Molecular Weight poly(D,L-lactide)-b-poly(ethylene Glycol) Copolymers.” European Polymer Journal 45 (10): 2839–2848.
APA
Lemmouchi, Y., Murariu, M., Dos Santos, A. M., Amass, A. J., Schacht, E., & Dubois, P. (2009). Plasticization of poly(lactide) with blends of tributyl citrate and low molecular weight poly(D,L-lactide)-b-poly(ethylene glycol) copolymers. EUROPEAN POLYMER JOURNAL, 45(10), 2839–2848.
Vancouver
1.
Lemmouchi Y, Murariu M, Dos Santos AM, Amass AJ, Schacht E, Dubois P. Plasticization of poly(lactide) with blends of tributyl citrate and low molecular weight poly(D,L-lactide)-b-poly(ethylene glycol) copolymers. EUROPEAN POLYMER JOURNAL. 2009;45(10):2839–48.
MLA
Lemmouchi, Yahia, Marius Murariu, Ana Margarida Dos Santos, et al. “Plasticization of Poly(lactide) with Blends of Tributyl Citrate and Low Molecular Weight poly(D,L-lactide)-b-poly(ethylene Glycol) Copolymers.” EUROPEAN POLYMER JOURNAL 45.10 (2009): 2839–2848. Print.
@article{2010654,
  abstract     = {Polylactide (PLA) is a potential candidate for the partial replacement of petrochemical polymers because it is biodegradable and produced from annually renewable resources. Characterized by its high tensile strength, unfortunately the brittleness and rigidity limit its applicability. For a great number of applications such as packaging, fibers, films, etc., it is of high interest to formulate new PLA grades with improved flexibility and better impact properties. In order to develop PLA-based biodegradable packaging, the physico-mechanical properties of commercially available PLA should be modified using biodegradable plasticizers. To this end, PLA was melt-mixed with blends of tributyl citrate and more thermally stable low molecular weight block copolymers based on poly(d,l-lactide) and poly(ethylene glycol) of different molecular weights and topologies. The copolymers have been synthesized using a potassium based catalyst which is expected to be non toxic and were characterized by utilization of TGA, GPC and NMR techniques. The effect of the addition of up to 25 wt\% plasticizer on the thermo-mechanical properties of PLA was investigated and the results were correlated with particular attention to the relationship between properties and applications. To confirm the safety of the catalyst used for the preparation of the copolymers, in vitro cytotoxicity tests have been carried out using MTS assay and the results show their biocompatibility in the presence of the fibroblast cells. Compost biodegradation experiments carried out using neat and plasticized PLA have shown that the presence of plasticizers accelerates the degradation of the PLA matrix.},
  author       = {Lemmouchi, Yahia and Murariu, Marius and Dos Santos, Ana Margarida and Amass, Allan J and Schacht, Etienne and Dubois, Philipe},
  issn         = {0014-3057},
  journal      = {EUROPEAN POLYMER JOURNAL},
  keyword      = {PHYSICAL-PROPERTIES,PACKAGING MATERIALS,POLY(L-LACTIC ACID),POLY(ETHYLENE GLYCOL),MECHANICAL-PROPERTIES,BARRIER PROPERTIES,PHASE-SEPARATION,POLYLACTIC ACID,MISCIBILITY,Biodegradable polymers,Poly(lactide),Plasticization,Thermo-mechanical properties,Packaging,Compost degradation,CONTROLLED DRUG-DELIVERY},
  language     = {eng},
  number       = {10},
  pages        = {2839--2848},
  title        = {Plasticization of poly(lactide) with blends of tributyl citrate and low molecular weight poly(D,L-lactide)-b-poly(ethylene glycol) copolymers},
  url          = {http://dx.doi.org/10.1016/j.eurpolymj.2009.07.006},
  volume       = {45},
  year         = {2009},
}

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