Data for Crystallinity-independent toughness in renewable poly(L-lactide) triblock plastics
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2022-05-01
2024-01-15
2024-01-15
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2024-01-29
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Data for Crystallinity-independent toughness in renewable poly(L-lactide) triblock plastics
Published Date
2024-03-18
Author Contact
Hillmyer, Marc A
hillmyer@umn.edu
hillmyer@umn.edu
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Abstract
Poly(L-lactide) (PLLA)’s broad applicability is hindered by its brittleness and slow crystallization kinetics. Among the strategies for developing tough, thermally resilient PLLA-based materials, the utilization of neat PLLA block polymers has received comparatively little attention despite its attractive technological merits. In this work, we comprehensively describe the microstructural, thermal, and mechanical properties of two compositional libraries of PLLA-rich PLLA-b-poly(γ-methyl-ε-caprolactone) (PγMCL)-b-PLLA (“LML”) triblock copolymers. The rubbery PγMCL domains microphase separate from the matrix in the melt and intercalate between PLLA crystal lamellae on cooling. Despite the mobility constraints associated with mid-block tethering, the PLLA end-blocks crystallize as rapidly as a PLLA homopolymer control of similar molar mass. Independent of their degree of crystallinity, LML triblocks exhibit vastly improved tensile toughnesses (63-113 MJ m-3) over that of PLLA homopolymer (1.3-2 MJ m-3), with crystallinities of up to 55% and heat distortion temperatures (HDTs) as high as 148 °C. We investigated the microstructural origins of this appealing performance using X-ray scattering and microscopy. In the case of a largely amorphous PLLA matrix, the PγMCL domains cavitate to enable concurrent PLLA shear yielding and strain-induced crystallization. In highly crystalline PLLA matrices, PγMCL facilitates a lamellar-to-fibrillar transition during tensile deformation, the first such transition reported for PLLA drawn at room temperature. These results highlight the unique attributes of PLLA block polymers and prompt future architectural and processing optimizations to achieve ultratough, high-HDT PLLA block polymer plastics after a simple thermal history on economical timescales.
Description
A full description can be found in the readme.txt file. The files below include raw data used in the manuscript, including atomic force microscopy (AFM), dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), heat distortion temperature (HDT) testing, nuclear magnetic resonance (NMR), polarized light optical microscopy (PLOM), size exclusion chromatography (SEC), scanning electron microscopy (SEM), uniaxial tensile testing, thermogravimetric analysis (TGA), and X-ray scattering (both small- and wide-angle, SAXS and WAXS respectively). The ChemDraw schemes generated for the manuscript are included.
Software requirements:
NMR - .fid files can be opened using standard NMR software, such as MestreNova and Topspin
PLOM, SEM - .tif files can be opened using native photo viewers (e.g., Windows Photo Viewer)
X-ray scattering - .tif files must be opened using a 2D X-ray image analysis software, such as DataSqueeze or Nika (Igor Pro)
AFM - .mi or .spm files must be opened using an AFM image analysis software, such as Gwyddion or Nanoscope
* All other files are .txt, .csv, .xls, or .xlsx and can be opened using a spreadsheet editor (e.g., Microsoft Excel)
Referenced by
Krajovic, D. M.; Haugstad, G.; Hillmyer, M. A. Crystallinity-Independent Toughness in Renewable Poly(l-Lactide) Triblock Plastics. Macromolecules 2024.
https://doi.org/10.1021/acs.macromol.3c02580
https://doi.org/10.1021/acs.macromol.3c02580
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This research was supported by a grant from the Minnesota Corn Research and Promotion Council (Project 6073-22DD), a University of Minnesota College of Science and Engineering Graduate Fellowship, and an National Science Foundation Graduate Research Fellowship (Grant No. 2237827). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. G.H. acknowledges financial support from the University of Minnesota Industrial Partnership for Research in Interfacial and Materials Engineering (IPRIME) program. Parts of this research were carried out at the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC (Award Number DMR-2011401) and the NNCI (Award Number ECCS-2025124) programs.
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Suggested citation
Krajovic, Daniel M; Haugstad, Greg; Hillmyer, Marc A. (2024). Data for Crystallinity-independent toughness in renewable poly(L-lactide) triblock plastics. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/nppq-1z11.
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readme.txt
Description of the data files
(268.2 KB)
Figure S9 - Impurity analysis cartoons, triblocks.cdxml
ChemDraw Scheme S9
(19.88 KB)
Figure S9 - Impurity analysis cartoons, triblocks.tif
ChemDraw Scheme S9, image
(235.76 KB)
Figure S10 - Impurity analysis cartoons, general.cdxml
ChemDraw Scheme S10
(20.27 KB)
Figure S10 - Impurity analysis cartoons, general.tif
ChemDraw Scheme S10, image
(161.38 KB)
Scheme 1 - LML synthesis scheme.cdxml
ChemDraw Scheme 1
(28.52 KB)
Scheme 1 - LML synthesis scheme.tif
ChemDraw Scheme 1, image
(217.66 KB)
Izod_impact_testing_D256_raw_data.xlsx
Raw data - notched Izod impact toughness
(14.78 KB)
Raw_AFM.zip
Raw data - atomic force microscopy
(43.03 MB)
Raw_DMTA.zip
Raw data - dynamic mechanical thermal analysis
(314.67 KB)
Raw_DSC.zip
Raw data - differential scanning calorimetry
(124.02 MB)
Raw_HDT.zip
Raw data - heat distortion temperature testing
(3.88 MB)
Raw_NMR.zip
Raw data - nuclear magnetic resonance spectroscopy
(4.72 MB)
Raw_PLOM.zip
Raw data - polarized light optical microscopy
(106.08 MB)
Raw_SEC.zip
Raw data - size exclusion chromatography
(20 MB)
Raw_SEM.zip
Raw data - scanning electron microscopy
(77.19 MB)
Raw_tensile_testing.zip
Raw data - uniaxial tensile testing
(8.67 MB)
Raw_TGA.zip
Raw data - thermogravimetric analysis
(1.49 MB)
Raw_X-ray.zip
Raw data - X-ray scattering
(3.63 GB)
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