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Modification of Brittle Polylactide by Novel Hyperbranched Polymer-Based Nanostructures
Open accessAbstract
The inherent brittleness of polylactide (PLA) poses considerable scientific challenges and limits its large-scale applications. Here, we propose and demonstrate a new industrially relevant methodology to develop a polylactide (PLA)-based nanoblend having outstanding stiffness-toughness balance. In this approach, a hydroxyl functional hyperbranched polymer (HBP) was in-situ cross-linked with a polyanhydride (PA) in the PLA matrix during melt processing. There was formation of new hyperbranched polymer-based cross-linked particles in the PLA matrix. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) revealed the sea-island morphology of PLA-cross-linked HBP blend. The domain size of cross-linked HBP particles in the PLA matrix was less than 100 nm as obtained from TEM. The presence of cross-linked hyperbranched polymer in the PLA matrix exhibited approximately 570% and approximately 847% improvement in the toughness and elongation at break, respectively, as compared to unmodified PLA. The increase in the ductility of modified PLA was related to stress whitening and multiple crazing initiated in the presence of cross-linked HBP particles. Formation of a networked interface as revealed by rheological data was associated with enhanced compatibility of the PLA-cross-linked HBP blend as compared to the PLA/HBP blend. The cross-linking reaction of HBP with PA was confirmed with the help of Fourier transform infrared spectroscopy (FTIR) and low-temperature dynamical mechanical thermal analysis (DMTA).
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Cites
Preparation and Properties of Plasticized Poly(lactic acid) Films
Ljungberg, N., & Wesslén, B. (2005) · Biomacromolecules · doi:10.1021/bm050098f · Cited by 331
(Co)polymers of L‐lactide, 2. Mechanical properties
Grijpma, D. W., & Pennings, A. J. (1994) · Macromolecular Chemistry and Physics · doi:10.1002/macp.1994.021950516 · Cited by 191
Cited by
Research progress in toughening modification of poly(lactic acid)
Liu, H., & Zhang, J. (2011) · Journal of Polymer Science Part B: Polymer Physics · doi:10.1002/polb.22283 · Cited by 767
From Lactic Acid to Poly(lactic acid) (PLA): Characterization and Analysis of PLA and Its Precursors
Inkinen, S., Hakkarainen, M., Albertsson, A.-C., & Södergård, A. (2011) · Biomacromolecules · doi:10.1021/bm101302t · Cited by 710
Controlled Polymerization of Next-Generation Renewable Monomers and Beyond
Yao, K., & Tang, C. (2013) · Macromolecules · doi:10.1021/ma3019574 · Cited by 485
Liu, H., Song, W., Chen, F., Guo, L., & Zhang, J. (2011) · Macromolecules · doi:10.1021/ma1026934 · Cited by 317
Nakagaito, A. N., Fujimura, A., Sakai, T., Hama, Y., & Yano, H. (2009) · Composites Science and Technology · doi:10.1016/j.compscitech.2009.03.004 · Cited by 280
Metadata
- Authors
- Bhardwaj, R., & Mohanty, A. K.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-07-03
- Volume
- 8
- Issue
- 8
- Pages
- 2476-2484
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2022813992
- Cited by
- 185
- References
- 2
- FWCI
- 3.21
- Type
- journal article
- Language
- en
- Open access
- hybrid
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