Publication: Plasticization of Biodegradable Poly(Lactic Acid) by Different Triglyceride Molecular Sizes: A Comparative Study with Glycerol
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Issued Date
2018
Resource Type
File Type
application/pdf
ISSN
15662543
Other identifier(s)
2-s2.0-85018431954
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Polymers and the Environment. Vol 26, No.3 (2018), p.1160-1168
Suggested Citation
Petchwattana N., Sanetuntikul J., Narupai B. Plasticization of Biodegradable Poly(Lactic Acid) by Different Triglyceride Molecular Sizes: A Comparative Study with Glycerol. Journal of Polymers and the Environment. Vol 26, No.3 (2018), p.1160-1168. doi:10.1007/s10924-017-1012-7 Retrieved from: https://hdl.handle.net/20.500.14740/3683
Author(s)
Abstract
In this paper, poly(lactic acid) (PLA) was toughened and softened by four different molecular size plasticizers namely; glycerol, tributyrin, trilaurin and tristearin. Among four plasticizers studied, tributyrin seems the most appropriate plasticizer for PLA due to its proper molecular size. It increased the tensile elongation at break and impact strength by around ten and three times respectively, with only 10 wt% addition. For PLA with trilaurin and tristearin, they did not show the remarkable toughness improvement. Scanning electron microscope (SEM) observation indicated some phase separations of PLA plasticized with glycerol, trilaurin and tristearin, while tributyrin showed its homogeneity to PLA matrix with higher plastic deformations. Under dynamic load, some shifts of the E′ drop and tanδ peak around 10–40 °C were observed, when glycerol and tributyrin was added. Differential scanning calorimeter (DSC) measurements showed some significant shifts of the transition temperatures, while the degree of crystallinity increased slightly. Heat distortion temperature of the blends fluctuated in a small range of 2–3 °C, which still restricted the use of PLA products above 60 °C. © 2017, Springer Science+Business Media New York.
Subject(s)
Differential scanning calorimetry
Dynamic loads
Glycerol
Impact strength
Lactic acid
Plasticizers
Reinforced plastics
Scanning electron microscopy
Solvents
Thermodynamic properties
Comparative studies
Degree of crystallinity
Differential scanning calorimeters
Dynamic mechanical behavior
Heat distortion temperature
Plasticization
Tensile elongation
Triglycerides
Biodegradable polymers
Biodegradation
Comparative study
Dynamic property
Ester
Mechanical property
Polymer
Dynamic loads
Glycerol
Impact strength
Lactic acid
Plasticizers
Reinforced plastics
Scanning electron microscopy
Solvents
Thermodynamic properties
Comparative studies
Degree of crystallinity
Differential scanning calorimeters
Dynamic mechanical behavior
Heat distortion temperature
Plasticization
Tensile elongation
Triglycerides
Biodegradable polymers
Biodegradation
Comparative study
Dynamic property
Ester
Mechanical property
Polymer