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The study of water transport in polylactide and polylactide derivatives
2021Bio-based polymers have numerous potential advantages over traditional polymers. Polylactide (PLA) is a biodegradable and environmentally friendly polyester that is made from renewable sources. However, the moisture barrier properties in PLA are still poorly understood.
An Du, Richard Allan Cairncross
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Biomacromolecules, 2009
A series of polylactide-polymenthide-polylactide triblock copolymers containing either amorphous poly(D,L-lactide) or semicrystalline, enantiopure poly(L-lactide) or poly(D-lactide) end segments were synthesized. Small-angle X-ray scattering and differential scanning calorimetry data were consistent with microphase separation of these materials.
Carolyn L, Wanamaker +5 more
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A series of polylactide-polymenthide-polylactide triblock copolymers containing either amorphous poly(D,L-lactide) or semicrystalline, enantiopure poly(L-lactide) or poly(D-lactide) end segments were synthesized. Small-angle X-ray scattering and differential scanning calorimetry data were consistent with microphase separation of these materials.
Carolyn L, Wanamaker +5 more
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Ageing of polylactide and polylactide nanocomposite filaments
Polymer Degradation and Stability, 2008An experimental study was carried out in order to check the influence of various parameters on the ageing of PLA filaments performed in a climatic room. Initially, two grades of PLA with different d-isomer contents were analysed. Even after several weeks of ageing, properties of PLA filaments with less than 0.5% d-isomer content did not vary ...
Samuel Solarski +2 more
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Stereocomplexation and Morphology of Polylactides
Macromolecules, 1995Blends of isotactic polylactides of opposite configurations lead to the formation of stereocomplexes, provided the enantiomeric excess of the two homopolymers in contact is high enough. In this study, the stereocomplex formation between a poly(L-lactide) (100L) having an enantiomeric excess of 100% and a poly(D-lactide) having an enantiomeric excess of
Brochu, Sylvie +3 more
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Water Transport in Polylactide and Polylactide/Montmorillonite Composites
Journal of Polymers and the Environment, 2012Polylactide–montmorillonite composites were fabricated by melt-blending followed by compression molding, and water permeability of the composites was studied by both experiments and theoretical models. The water permeation in composites decreases with increasing concentration of montmorillonite.
An Du +4 more
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Polyurethane Toughened Polylactide *
Polymer Bulletin, 1998Brittle polylactide (PLA) was toughened by introducing 5 wt % of a poly(ɛ-caprolactone)(PCL) diol- and triol-based polyurethane (PU) network. The extent of cross-linking of the PU was varied by changing the ratio between diol and triol. The effects of the PU content and its crosslink density on the mechanical properties and the toughness of PU/PLA ...
Yumin Yuan, Eli Ruckenstein
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Biocompatible Polylactide-block-Polypeptide-block-Polylactide Nanocarrier
Biomacromolecules, 2013Polypeptides are successfully incorporated into poly(l-lactide) (PLLA) chains in a ring-opening polymerization (ROP) of l-lactide by using them as initiators. The resulting ABA triblock copolymers possess molecular weights up to 11000 g·mol(-1) and polydispersities as low as 1.13, indicating the living character of the polymerization process.
Dorresteijn, R. +10 more
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Polylactide stereocomplex crystallites as nucleating agents for isotactic polylactide
Journal of Polymer Science Part B: Polymer Physics, 2001A nucleation efficiency scale for isotactic poly(L-lactide) (PLLA) was obtained with self-nucleation and nonisothermal differential scanning calorimetry experiments. The maximum nucleation efficiency occurred at the highest concentration of self-nucleating sites, and the minimum efficiency occurred in the absence of these sites (pure PLLA polymer melt).
Scott C. Schmidt, Marc A. Hillmyer
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Injection-Molded Solid and Microcellular Polylactide and Polylactide Nanocomposites
Journal of Biobased Materials and Bioenergy, 2007Microcellular injection molding is capable of producing lightweight, dimensionally stable plastic components with less material and energy. This process allows the material to be processed at lower temperatures and pressures, making it suitable for temperature-sensitive biobased plastics and/or additives.
Adam Kramschuster +4 more
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