Tensile properties of PLA/PBAT blends and PLA fibre-reinforced PBAT composite
Open accessAbstract
The tensile properties of PLA/PBAT blends, PLA fibre reinforced PBAT composite (PLAF) at room temperature and -18°C were investigated. The concentrations of PLA in the blends were 10%, 20%, 30% and 40% (by volume). There was an improvement of elastic modulus (E) for PLA/PBAT blends when PLA was 40%. There was no significant difference of ultimate tensile strength (UTS) among the blends. For the same concentration of PLA (40%) in PLA-PBAT mixture, PLAF exhibited higher values of E and UTS than that of PLA/PBAT blends. Elongation of PLA/PBAT blends rapidly decreased upon the addition of PLA to the blends. The values of E and UTS for PLA/PBAT blends and composite, neat PLA, and PP increased with the decreasing of temperature from room temperature to -18°C. The effect of decreasing temperature was not observed on elongation. It was appeared from the results obtained for FTIR and DSC measurements that PLA and PBAT were immiscible, separating into two phases.
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PBAT/PLA blends generally represent two melting temperatures (Tm ~ 120 °C/152 °C) corresponding to those for PBAT and PLA.
“The PBAT/PLA blends generally represent two separated almost unchanged glass transition temperatures (Tg ~ −30 °C and 61 °C) and two melting temperatures (Tm ~ 120 °C/152 °C) corresponding to those for PBAT and PLA, which is in agreement with the observation of the blends in the literature [12,13].”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
Section 3.3 reports two melting temperatures in PLA/PBAT blends, corresponding to PBAT and PLA. However, Table 3 lists blend melting temperatures of 126.3–128.6 °C and 147.5–148.6 °C; the quoted ~120 °C and ~152 °C are closer to the neat polymers’ values of 122.9 °C and 152.9 °C. (LLM, conf=0.85)
Experimental — accuracy not yet measuredPBAT/PLA blends generally represent two separated almost unchanged glass transition temperatures (Tg ~ −30 °C and 61 °C) corresponding to those for PBAT and PLA.
“The PBAT/PLA blends generally represent two separated almost unchanged glass transition temperatures (Tg ~ −30 °C and 61 °C) and two melting temperatures (Tm ~ 120 °C/152 °C) corresponding to those for PBAT and PLA, which is in agreement with the observation of the blends in the literature [12,13].”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
Section 3.3 reports two distinct glass transitions corresponding to the PBAT and PLA phases, and Table 3 shows that they change little across the blends. The temperatures in Table 3 are about −34 to −36 °C and 55–56 °C, however, not approximately −30 °C and 61 °C as claimed. (LLM, conf=0.84)
Experimental — accuracy not yet measuredWhen PBAT acts as a polymer matrix, the modulus of elasticity decreases with decreasing PLA content.
“When PBAT acts as a polymer matrix, i.e., PLA is the dispersed component, the elongation at break increases, but the modulus of elasticity decreases with decreasing PLA content [13].”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
Section 3.1.1 reports a higher elastic modulus at 40% PLA than at lower PLA concentrations, which supports a decrease when moving below 40%. But it says neat PBAT and blends with 10%, 20%, and 30% PLA did not differ significantly in modulus, so it does not support a decrease with every reduction in PLA content. The supplied passages do not give page numbers. (LLM, conf=0.86)
Experimental — accuracy not yet measuredThe typical sea-islands morphology in SEM depicts poor miscibility between PBAT and PLA.
“The typical sea-islands morphology in SEM depicts poor miscibility between PBAT and PLA, which is consistent with the observation in other studies [9,13].”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
Section 3.1.1 reports poor interfacial adhesion and phase separation, and the Conclusions say FTIR and DSC measurements suggest PLA and PBAT are immiscible. The paper does not report SEM observations or a sea-islands morphology, so it supports the poor-miscibility finding but not the claimed visual evidence. (LLM, conf=0.88)
Experimental — accuracy not yet measuredWhen PBAT acts as a polymer matrix (PLA dispersed), the elongation at break increases with decreasing PLA content.
“When PBAT acts as a polymer matrix, i.e., PLA is the dispersed component, the elongation at break increases, but the modulus of elasticity decreases with decreasing PLA content [13].”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
PBAT/PLA blends show two almost unchanged glass transition temperatures in DSC.
“However, they show two almost unchanged glass transition temperatures in the DSC, phase separation in SEM and two relaxation mechanisms in the Cole–Cole plot.”
From Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties (2020) · cites this paper as [13]
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Cites
Jalali Dil, E., Carreau, P. J., & Favis, B. D. (2015) · Polymer · doi:10.1016/j.polymer.2015.05.012 · Cited by 158 · see citing works
Flagged first, then by citations
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Sorted by citations
Uncompatibilized PBAT/PLA Blends: Manufacturability, Miscibility and Properties
Su, S., Duhme, M., & Kopitzky, R. (2020) · Materials · doi:10.3390/ma13214897 · Cited by 159 · see citing works
Sooraj, V., Bhagavatula, S. G. K., & Kannan, M. (2025) · Journal of Applied Polymer Science · doi:10.1002/app.57087 · Cited by 16 · see citing works
Bharathan, S. P., Guthige, M. R., Kumar, S., Kumar, R., & George, J. (2026) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2026.153379 · Cited by 2 · see citing works
- Authors
- Sritham, E., Phunsombat, P., & Chaishome, J.
- Affiliations
- King Mongkut's Institute of Technology Ladkrabang (TH)
- Corresponding author
- Sritham, Eakasit
- Venue
- MATEC Web of Conferences
- Publisher
- EDP Sciences
- Published
- 2018
- Volume
- 192
- Pages
- 03014
- ISSN
- 2261-236X (ISSN-L)
- OpenAlex
- W2887053897
- Cited by
- 47
- References
- 1
- Citations by year
- 2026: 10 · 2025: 14 · 2024: 7 · 2023: 8 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 1
- FWCI
- 3.74
- Type
- conference paper
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- MATEC Web of Conferences (publishedVersion, cc-by)
- Springer Link (Chiba Institute of Technology) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Research Council of Thailand
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Natural Fiber Reinforced Composites
- Keywords
- PLA/PBAT blends, tensile properties, elastic modulus, ultimate tensile strength, elongation at break, temperature effects, immiscibility, phase separation, polylactic acid, biodegradable polymer blends
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