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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Piorkowska, Ewa
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Crystallization-Controlled Structure and Thermal Properties of Biobased Poly(Ethylene2,5-Furandicarboxylate)citations
- 2024Structure and Mechanical Properties of iPP-Based Nanocomposites Crystallized under High Pressurecitations
- 2022Formation of UHMWPE Nanofibers during Solid-State Deformationcitations
- 2021Shear-Induced Crystallization of Star and Linear Poly(L-lactide)scitations
- 2020Structure, processing and performance of ultra-high molecular weight polyethylene (IUPAC Technical Report). Part 4: sporadic fatigue crack propagationcitations
- 2020Significant modification of the surface morphology of polylactide (PLA) and PLA-halloysite nanocomposites in the presence of N, N'-ethylenebis(stearamide)upon thermal treatment
- 2017The effect of halloysite nanotubes and N,N-ethylenebis (stearamide) on the properties of polylactide nanocomposites with amorphous matrix
- 2017The effect of halloysite nanotubes and N,N'-ethylenebis (stearamide) on morphology and properties of polylactide nanocomposites with crystalline matrix
- 2017The effect of halloysite nanotubes (HNT) and N,N'-ethylenebis(stearamide) (EBS) on the crystalline morphology and properties of polylactide nanocomposites
- 2014The Influence of Chemical Composition of Aliphatic-Aromatic Copolyesters on their Properties
- 2013Nonisothermal shear-induced crystallization of polypropylene-based composite materials with montmorillonitecitations
- 2009Shear-induced crystallization of isotactic polypropylene based nanocomposites with montmorillonitecitations
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article
Shear-Induced Crystallization of Star and Linear Poly(L-lactide)s
Abstract
<jats:p>The influence of macromolecular architecture on shear-induced crystallization of poly(L-lactide) (PLLA) was studied. To this aim, three star PLLAs, 6-arm with Mw of 120 and 245 kg/mol, 4-arm with Mw of 123 kg/mol, and three linear PLLAs with Mw of 121, 240 and 339 kg/mol, were synthesized and examined. The PLLAs were sheared at 170 and 150 °C, at 5/s, 10/s and 20/s for 20 s, 10 s and 5 s, respectively, and then cooled at 10 or 30 °C/min. Shear-induced crystallization during cooling was followed by a light depolarization method, whereas the crystallized specimens were examined by DSC, 2D-WAXS, 2D-SAXS and SEM. The effect of shear depended on the shearing conditions, cooling rate and polymer molar mass but it was also affected by the macromolecular architecture. The shear-induced crystallization of linear PLLA with Mw of 240 kg/mol was more intense than that of the 6-arm polymer with similar Mw, most possibly due to its higher Mz. However, the influence of shear on the crystallization of the star polymers with Mw close to 120 kg/mol was stronger than on that of their linear analog. This was reflected in higher crystallization temperature, as well as crystallinity achieved during cooling.</jats:p>