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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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Rastogi, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2023An Unconventional Route for Synthesis and Solid-State Processing of Low-Entangled Ultra-High Molecular Weight Isotactic Polypropylenecitations
- 2022Suppression in Melt Viscosity of the Homogeneously Mixed Blends of Polypropylene (iPP-UHMWiPP) in the Presence of an Oxalamidecitations
- 2020Interfacial stereocomplexation in heterogeneous polymer powder formulations for reinforcing (laser) sintered weldscitations
- 2016Heterogeneous Distribution of Entanglements in a Nonequilibrium Polymer Melt of UHMWPE: Influence on Crystallization without and with Graphene Oxidecitations
- 2011Catalyst behaviour for 1-pentene and 4-methyl-1-pentene polymerisation for C2-, Cs- and C1-symmetric zirconocenescitations
- 2011Novel, fully biobased semicrystalline polyamidescitations
- 2011Novel, Fully Biobased Semicrystalline Polyamidescitations
- 2010Surfactant assisted processable organic nanocomposite dispersions of polyaniline-single wall carbon nanotubescitations
- 2009Influence of Nanoparticles on the Rheological Behaviour and Initial Stages of Crystal Growth in Linear Polyethylenecitations
- 2007The role of the amorphous phase in melting of linear UHMW-PE : implications for chain dynamicscitations
- 2005Heterogeneity in polymer melts from melting of polymer crystalscitations
- 2005Inverse melting in syndiotactic polystyrenecitations
- 2005The explanation of the increase in slope at the Tg in the plot of d-spacing versus temperature in polyacrylonitrilecitations
- 2004The three-phase structure and mechanical properties of poly(ethylene terephthalate)citations
- 2002Influence of thermal treatments on the polymorphism in stereoirregular isotacic polypropylene: Effect of stereo-defect distributioncitations
- 2001Rubber-Modified Glassy Amorphous Polymers Prepared via Chemically Induced Phase-Separation - 2 - Mode of Microscopic Deformation Studied by in-Situ Small-Angle X-Ray-Scattering During Tensile Deformationcitations
- 2000Welding behavior of semi-crystalline polymers 2. The effect of cocrystallisation on autoadhesioncitations
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article
Suppression in Melt Viscosity of the Homogeneously Mixed Blends of Polypropylene (iPP-UHMWiPP) in the Presence of an Oxalamide
Abstract
Here we report on the influence of an aliphatic oxalamide-based nucleating agent (OXA3,6) on the viscoelastic and mechanical properties of isotactic polypropylene (iPP) blended with ultrahigh molecular weight iPP (UHMWiPP). The linear viscoelastic properties are investigated by using a plate-plate rheometer; the presence of only 0.5 wt % of OXA3,6 in the iPP-UHMWiPP blends results in a reduction of the complex viscosity in the entire frequency domain examined. This observation holds irrespective of the UHMWiPP weight fraction, up to 25 wt %. The viscosity suppression is attributed to an acceleration of the reorientation times of the chains, especially the longer ones, due to partial alignment of their molecular segments. Furthermore, SAXS measurements on cooled, injection molded samples hint that OXA3,6-containing samples display enhanced alignment under processing conditions (injection molding). Compared to samples without OXA, an increase in the SAXS intensity along the equator is observed in the OXA3,6 samples, implying an enhanced ability of shish-kebab formation. Such a morphological development results in higher yield stress while maintaining the elastic behavior.