| People | Locations | Statistics |
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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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Hosier, Ian L.
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2021Enhanced boron nitride/polyolefin blends for high voltage applicationscitations
- 2019High performance polymer blend systems for HVDC applicationscitations
- 2018Polymer blend systems for HVDC cable applicationscitations
- 2018Enhanced electrical and thermal rating materials for renewable power cable connectionscitations
- 2017The effects of water on the dielectric properties of aluminum based nanocompositescitations
- 2017On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part II – Charge Transportcitations
- 2017On the effect of functionalizer chain length and water content in polyethylene/silica nanocompositescitations
- 2017The effects of water on the dielectric properties of silicon based nanocompositescitations
- 2015The effects of surface hydroxyl groups in polyethylene-silica nanocomposites
- 2014Dielectric studies of polystyrene-based, high-permittivity composite systemscitations
- 2014Effect of water absorption on dielectric properties of nano-silica/polyethylene compositescitations
- 2014Barium titanate and the dielectric response of polystyrene-based composites
- 2013On the dielectric response of silica-based polyethylene nanocompositescitations
- 2013On Nanosilica Surface Functionalization Using Different Aliphatic Chain Length Silane Coupling Agents
- 2013Absorption Current Behaviour of Polyethylene/Silica Nanocomposites
- 2013Permittivity mismatch and its influence on ramp breakdown performance
- 2010An investigation of the potential of ethylene vinyl acetate/polyethylene blends for use in recyclable high voltage cable insulation systems
- 2004Lamellar morphology of random metallocene propylene copolymers studied by atomic force microscopy
- 2003Formation of the alpha and gamma polymorphs in random metallocene-propylene copolymers. Effect of concentration and type of comonomer
- 2000A study of the morphologies and growth kinetics of three monodisperse n-alkanes: C122H246, C162H326 and C246H494
Places of action
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article
Lamellar morphology of random metallocene propylene copolymers studied by atomic force microscopy
Abstract
Four sets of propylene based random copolymers with co-units of ethylene, 1-butene, 1-hexene and 1-octene, and a total defect content up to similar to 9 mol% (including co-unit and other defects), were studied after rapid and isothermal crystallization. Etched film surfaces and ultrarnicrotomed plaques were imaged so as to enhance contrast and minimize catalyst and co-catalyst residues. While increasing concentration of structural irregularities breaks down spherulitic habits, the formation of the gamma polymorph has a profound effect on the lamellar morphology. Lamellae grown in the radial axis of the spherulite and branches hereon are replaced in gamma-rich copolymers with a dense array of short lamellae transverse or tilted to the main structural growth axis. This is the expected orientation for gamma iPP branching from a seeds. Spherulites are formed in copolymers with non-crystallizable units ( 1-hexene and 1-octene) up to similar to 3 mol% total defect content and were observed up to similar to 6 mol% in those with partially crystallizable comonorners (ethylene and 1-butene). However, lamellae were observed in all the copolymers analyzed, even in the most defective ones, highlighting the important role of the gamma polymorph in propagating lamellar crystallites in poly(propylenes) with a high concentration of defects. Long periods measured from AFM and SAXS are comparatively analyzed.