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Crystallization and heat resistance of PBAT/PLLA/PDLA blends.
- Source :
- Journal of Donghua University (Natural Science Edition); Dec2023, Vol. 49 Issue 6, p43-52, 10p
- Publication Year :
- 2023
-
Abstract
- The effect of PBAT (poly(butylene adipate-co-terephthalate)) content and crystallization temperature on the crystallization and heat resistance of PLLA/PDLA blends are studied. The PBAT/PLLA/PDLA blends with different PBAT content were prepared by melt blending. Then, differential scanning calorimetry (DSC) and Vicat softening temperature (VST) were used to investigate the semicrystallization time (t<subscript>1/2</subscript>), crystallinity and heat resistant of the blends. The results show that the incorporation of PBAT is benefit to the rate of crystallization and t<subscript>1/2</subscript> of the blends can be reduced from 1.0 min to 0.8 min at 100 °C. After annealing at 220 °C, the degree of stereo-complex (f<subscript>sc</subscript>), stereocomplex crystallinity (X<subscript>c,S</subscript>) and VST of PLLA/PDLA blends reaches up to 100.0%, 31.1% and 204 °C, respectively. The values of the former parameters reduce to 96.0%, 15.4% and °C 194 °C after incorporating 12% PBAT. It concludes that the crystallization under high temperature contributes to the improvement of X<subscript>c,S</subscript> and heat resistance. The incorporation of PBAT into PLLA/PDLA promotes the crystallization rate, while it reduces the heat resistance of the blends [ABSTRACT FROM AUTHOR]
- Subjects :
- CRYSTALLIZATION
DIFFERENTIAL scanning calorimetry
HEAT resistant materials
Subjects
Details
- Language :
- Chinese
- ISSN :
- 16710444
- Volume :
- 49
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Donghua University (Natural Science Edition)
- Publication Type :
- Academic Journal
- Accession number :
- 173958860
- Full Text :
- https://doi.org/10.19886/j.cnki.dhdz.2022.0346