Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12789
ชื่อเรื่อง: Plasticization of Biodegradable Poly(Lactic Acid) by Different Triglyceride Molecular Sizes: A Comparative Study with Glycerol
ผู้แต่ง: Petchwattana N.
Sanetuntikul J.
Narupai B.
Keywords: 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
วันที่เผยแพร่: 2018
บทคัดย่อ: 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.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12789
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018431954&doi=10.1007%2fs10924-017-1012-7&partnerID=40&md5=02471e7fcd2a747bd56a21d7b467d3e2
ISSN: 15662543
Appears in Collections:Scopus 1983-2021

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