Improvement of microstructures and properties of poly(lactic acid)/poly(ε‐caprolactone) blends compatibilized with polyoxymethylene
Abstract
Incompatibility of poly(lactic acid)/poly(ɛ‐caprolactone) (PLA/PCL) (80:20) and (70:30) blends were modified by incorporation of a small amount of polyoxymethylene (POM) (≤3 phr). Impact of POM on microstructures and tensile property of the blends were investigated. It is found that the introduction of POM into the PLA/PCL blends significantly improves their tensile property. With increasing POM loading from zero to 3 phr, elongation at break increases from 93.2% for the PLA/PCL (70:30) sample to 334.8% for the PLA/PCL/POM (70:30:3) sample. A size reduction in PCL domains and reinforcement in interfacial adhesion with increasing POM loading are confirmed by SEM observations. The compatibilization effect of POM on PLA/PCL blends can be attributed to hydrogen bonding between methylene groups of POM and carbonyl groups of PLA and PCL. In addition, nonisothermal and isothermal crystallization behaviors of PLA/PCL/POM (70:30:x) samples were investigated by using differential scanning calorimetry and wide angle X‐ray diffraction measurements. The results indicate that the crystallization dynamic of PLA matrix increases with POM loadings. It can be attributed to the fact that POM crystals have a nucleating effect on PLA. While crystallization temperature is 100 °C, crystallization half‐time can reduce from 9.4 to 2.0 min with increasing POM loading from zero to 3 phr. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46536.
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The trade-off between enhanced toughness and impaired strength/modulus in PLA-PCL persists despite efforts to modify hierarchical structures.
“However, the contradiction between enhanced toughness and impaired strength and modulus always existed.”
From Simultaneously Toughening and Strengthening of PLA-b-PCL Copolymer via Pressure-induced-flow Processing at Room Temperature (2018) · cites this paper as [22]
Addition of a small amount of polyoxymethylene (POM) caused a decrease in the size of PCL particles and a substantial increase in elongation at break for PLA/PCL (80/20) and (70/30) blends.
“Song et al. (2018) found a decrease in the size of PCL particles and substantial increase in elongation at break for PLA/PCL (80/20) and (70/30) blends after addition of a small amount of polyoxymethylene (POM).”
From Phase Structure, Compatibility, and Toughness of PLA/PCL Blends: A Review (2019) · cites this paper as Song et al., 2018
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Phase Structure, Compatibility, and Toughness of PLA/PCL Blends: A Review
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“However, it was found that the poor interfacial compatibility between PLLA and PCL limits the enhancement of the mechanical properties [12,13].”
BackgroundZhu, S., Zhang, K., Hu, Y., Xiong, M., Zhang, S., Jiao, M., & Yu, M. (2018) · IOP Conference Series: Materials Science and Engineering · doi:10.1088/1757-899x/436/1/012006 · Cited by 1 · see citing works
- Authors
- Song, Z., Huang, X., Lu, X., Lv, Q., Xu, N., Pang, S., Pan, L., & Li, T.
- Affiliations
- Hainan University (CN)
- Shiner National and Local Joint Engineering and Research Center Shiner Industrial Co., Ltd. Haikou 570125 People's Republic of China
- Corresponding author
- Xu, Nai
- Venue
- Journal of Applied Polymer Science
- Publisher
- Wiley
- Published
- 2018-04-21
- Volume
- 135
- Issue
- 31
- ISSN
- 0021-8995 (ISSN-L)
- 1097-4628
- OpenAlex
- W2800013954
- Cited by
- 14
- References
- 47
- Citations by year
- 2026: 4 · 2025: 2 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 2 · 2018: 2
- FWCI
- 0.75
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Applied Polymer Science (publishedVersion)
- Funders
- National Natural Science Foundation of China (51663010)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Natural Fiber Reinforced Composites
- Keywords
- polylactic acid, polycaprolactone, polyoxymethylene, polymer blends, blend compatibilization, blend incompatibility, tensile properties, elongation at break, interfacial adhesion, hydrogen bonding, crystallization behavior, nucleation effect, blend microstructure
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