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Supertoughened Renewable PLA Reactive Multiphase Blends System: Phase Morphology and Performance

Open access
Zhang, Kunyu, Nagarajan, Vidhya, Misra, Manjusri, Mohanty, Amar K.·2014·ACS Applied Materials & Interfaces
DOI 10.1021/am502337u
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Abstract

Multiphase blends of poly(lactic acid) (PLA), ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMA) terpolymer, and a series of renewable poly(ether-b-amide) elastomeric copolymer (PEBA) were fabricated through reactive melt blending in an effort to improve the toughness of the PLA. Supertoughened PLA blend showing impact strength of ∼500 J/m with partial break impact behavior was achieved at an optimized blending ratio of 70 wt % PLA, 20 wt % EMA-GMA, and 10 wt % PEBA. Miscibility and thermal behavior of the binary blends PLA/PEBA and PLA/EMA-GMA, and the multiphase blends were also investigated through differential scanning calorimetric (DSC) and dynamic mechanical analysis (DMA). Phase morphology and fracture surface morphology of the blends were studied through scanning electron microscopy (SEM) and atomic force microscopy (AFM) to understand the strong corelation between the morphology and its significant effect on imparting tremendous improvement in toughness. A unique "multiple stacked structure" with partial encapsulation of EMA-GMA and PEBA minor phases was observed for the PLA/EMA-GMA/PEBA (70/20/10) revealing the importance of particular blend composition in enhancing the toughness. Toughening mechanism behind the supertoughened PLA blends have been established by studying the impact fractured surface morphology at different zones of fracture. Synergistic effect of good interfacial adhesion and interfacial cavitations followed by massive shear yielding of the matrix was believed to contribute to the enormous toughening effect observed in these multiphase blends.

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Metadata

Authors
Zhang, K., Nagarajan, V., Misra, M., & Mohanty, A. K.
Venue
ACS Applied Materials & Interfaces
Publisher
American Chemical Society (ACS)
Published
2014-07-16
Volume
6
Issue
15
Pages
12436-12448
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
DOI
10.1021/am502337u
OpenAlex
W2319293843
Cited by
267
References
4
FWCI
13.11
Type
journal article
Language
en
Open access
hybrid
Licence
pubs.acs.org/page/policy/authorchoice_termsofuse.html (vor)

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CoChat. (2026). Citation check: Supertoughened Renewable PLA Reactive Multiphase Blends System: Phase Morphology and Performance. https://app.cochat.ai/papers/10.1021/am502337u
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Zhang, K., Nagarajan, V., Misra, M., & Mohanty, A. K. (2014). Supertoughened Renewable PLA Reactive Multiphase Blends System: Phase Morphology and Performance. ACS Applied Materials & Interfaces. https://doi.org/10.1021/am502337u

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