| 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
Formation of the alpha and gamma polymorphs in random metallocene-propylene copolymers. Effect of concentration and type of comonomer
Abstract
Four sets of random propylene-based copolymers with 1-10 mol % of ethylene, 1-butene, 1-hexene, or 1-octene as co-units, synthesized with the same metallocene catalyst, were investigated by differential scanning calorimetry and wide-angle X-ray scattering following rapid and isothermal crystallization. Parameters related to defect concentration, defect type, and microstructure and thermodynamic and kinetic factors were evaluated as to their role in developing the gamma polymorph. The effect of the comonomer in enhancing the fractional content of the gamma polymorph is akin to the role of defects in the homo-poly(propylene) chain. However, differences in the partitioning of the comonomer between the crystalline and noncrystalline regions leads to contents of the gamma phase that differ among the copolymers at any given crystallization temperature. Qualitatively, these differences can be used to assess the degree to which a counit participates in the crystallite. The experimental results suggest that there is no discrimination of the defects that enter the crystal lattice (stereo, regio, ethylene, or butylene units) between the alpha or gamma crystallites. The results with copolymers establish that the bases that lead to the formation of the gamma polymorph are the same for homo-poly(propylene) and its copolymers.