scholarly journals Poly(lactic acid) / Poly(ethylene glycol) blends: Mechanical, thermal and morphological properties

2016 ◽  
Author(s):  
M. Bijarimi ◽  
S. Ahmad ◽  
R. Rasid ◽  
M. A. Khushairi ◽  
M. Zakir
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Morphological Properties ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Chitin Nanofibrils in Poly(Lactic Acid) (PLA) Nanocomposites: Dispersion and Thermo-Mechanical Properties

2019 ◽  
Vol 20 (3) ◽  
pp. 504 ◽  
Author(s):  
Maria-Beatrice Coltelli ◽  
Patrizia Cinelli ◽  
Vito Gigante ◽  
Laura Aliotta ◽  
Pierfrancesco Morganti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Ethylene Glycol ◽  
Morphological Properties ◽  
Water Evaporation ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Water Suspension ◽  
Poly Ethylene ◽  
Reinforcing Filler

Chitin-nanofibrils are obtained in water suspension at low concentration, as nanoparticles normally are, to avoid their aggregation. The addition of the fibrils in molten PLA during extrusion is thus difficult and disadvantageous. In the present paper, the use of poly(ethylene glycol) (PEG) is proposed to prepare a solid pre-composite by water evaporation. The pre-composite is then added to PLA in the extruder to obtain transparent nanocomposites. The amount of PEG and chitin nanofibrils was varied in the nanocomposites to compare the reinforcement due to nanofibrils and plasticization due to the presence of PEG, as well as for extrapolating, where possible, the properties of reinforcement due to chitin nanofibrils exclusively. Thermal and morphological properties of nanocomposites were also investigated. This study concluded that chitin nanofibrils, added as reinforcing filler up to 12% by weight, do not alter the properties of the PLA based material; hence, this additive can be used in bioplastic items mainly exploiting its intrinsic anti-microbial and skin regenerating properties.

The effect of poly(ethylene glycol) as plasticizer in blends of poly(lactic acid) and poly(butylene succinate)

2015 ◽  
Vol 133 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Weraporn Pivsa-Art ◽  
Kazunori Fujii ◽  
Keiichiro Nomura ◽  
Yuji Aso ◽  
Hitomi Ohara ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Butylene Succinate ◽  
Poly Ethylene

Biodegradable polymer blends of poly(lactic acid) and poly(ethylene glycol)

1997 ◽  
Vol 66 (8) ◽  
pp. 1495-1505 ◽  
Author(s):  
Mihir Sheth ◽  
R. Ananda Kumar ◽  
Vipul Dav� ◽  
Richard A. Gross ◽  
Stephen P. McCarthy
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Polymer Blends ◽  
Biodegradable Polymer ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Effect of Neonatal Exposure to Poly(Ethylene Glycol)-block-Poly(Lactic Acid) Nanoparticles on Oxidative State in Infantile and Adult Female Rats

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Monika Dvořáková ◽  
Eva Rollerová ◽  
Soňa Scsuková ◽  
Alžbeta Bujňáková Mlynarčíková ◽  
Lucia Laubertová ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Female Rats ◽  
Protein Carbonyls ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Adult Rats ◽  
Potential Health ◽  
Age Related ◽  
Poly Ethylene

Our goal was to evaluate the potential health risk of the polymeric NP, poly(ethylene glycol)-block-poly(lactic acid) (PEG-b-PLA), from the view of redox imbalance of the organism in two different life stages. Female Wistar rats were neonatally administered intraperitoneally with PEG-b-PLA NPs [20 mg/kg of b.w. (PEG20) or 40 (PEG40) mg/kg of b.w.] from postnatal day 4 (PND4) to PND7. We measured antioxidant capacity (TEAC), level of protein carbonyls and lipoperoxides in plasma, activities of catalase, glutathione peroxidase (GPx), and superoxide dismutase (SOD) in hemolysates of infantile (sacrificed on PND17) and adult (sacrificed after PND176) rats. Compared to controls, neonatal PEG40 exposure induced a significant TEAC reduction in the infantile rats. Protein carbonyls and lipoperoxide levels were not affected after any dose of PEG-b-PLA NP administration. In adult rats, PEG20 administration caused a significant decrease of protein carbonyl levels compared to controls. In infantile rats, both doses of PEG-b-PLA NP administration increased catalase, Gpx, and SOD activities compared to controls. Surprisingly, in adult rats, the activities of Gpx and SOD decreased significantly after administration of both doses of PEG-b-PLA NPs. Obtained data indicate a possible age-related association between the oxidative status and neonatal PEG-b-PLA NP administration in female rats.

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