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Relationship between the Stereocomplex Crystallization Behavior and Mechanical Properties of PLLA/PDLA Blends
- Source :
- Polymers, Volume 13, Issue 11, Polymers, Vol 13, Iss 1851, p 1851 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- Poly (l-lactic acid) (PLLA) is a promising biomedical polymer material with a wide range of applications. The diverse enantiomeric forms of PLLA provide great opportunities for thermal and mechanical enhancement through stereocomplex formation. The addition of poly (d-lactic acid) (PDLA) as a nucleation agent and the formation of stereocomplex crystallization (SC) have been proven to be an effective method to improve the crystallization and mechanical properties of the PLLA. In this study, PLLA was blended with different amounts of PDLA through a melt blending process and their properties were calculated. The effect of the PDLA on the crystallization behavior, thermal, and mechanical properties of PLLA were investigated systematically by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), polarized optical microscopy (POM), dynamic mechanical analysis (DMA), and tensile test. Based on our findings, SC formed easily when PDLA content was increased, and acts as nucleation sites. Both SC and homo crystals (HC) were observed in the PLLA/PDLA blends. As the content of PDLA increased, the degree of crystallization increased, and the mechanical strength also increased.
- Subjects :
- Thermogravimetric analysis
Materials science
Polymers and Plastics
Biomedical polymers
PDLA
Nucleation
Organic chemistry
General Chemistry
Dynamic mechanical analysis
stereocomplex crystallization
mechanical properties
PLLA
Article
law.invention
Differential scanning calorimetry
QD241-441
homo crystallization
Chemical engineering
Optical microscope
law
Crystallization
Tensile testing
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....2eed9b9a709e29b9e131c0842796b198
- Full Text :
- https://doi.org/10.3390/polym13111851