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Modifying the thermal and mechanical properties of poly(lactic acid) by adding lithium trifluoromethanesulfonate
- Source :
- Journal of Polymer Research. 25
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- The effect of the addition of lithium trifluoromethanesulfonate (LiCF_3SO_3) on the linear viscoelastic properties, crystallization behavior, and mechanical properties of poly(lactic acid) (PLA) was studied. The glass transition temperature (T_g) was enhanced by adding LiCF_3SO_3, without any loss of transparency of the PLA. This was attributed to the ion-dipole interaction between the lithium cation and oxygen atom in the PLA carbonyl group. The interaction weakened at higher temperature. Consequently, the rheological terminal region was clearly detected, which suggested that the system possessed good melt-processability. The Young’s modulus and yield stress at room temperature were also enhanced by the addition of LiCF_3SO_3, although the toughness was reduced due to the brittle failure. Finally, the presence of LiCF_3SO_3 retarded the crystallization of PLA, because the segmental motion of the PLA chains was reduced.
- Subjects :
- Toughness
Materials science
Polymers and Plastics
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
Viscoelasticity
law.invention
chemistry.chemical_compound
stomatognathic system
law
Poly(lactic acid)
Materials Chemistry
Glass transition temperature
Crystallization
Organic Chemistry
respiratory system
021001 nanoscience & nanotechnology
0104 chemical sciences
Lactic acid
chemistry
Chemical engineering
lipids (amino acids, peptides, and proteins)
Lithium
Rheology
0210 nano-technology
Glass transition
Lithium Cation
Trifluoromethanesulfonate
Subjects
Details
- ISSN :
- 15728935 and 10229760
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Journal of Polymer Research
- Accession number :
- edsair.doi.dedup.....76e57fc99ff8ec779e9ff8b636c13b30