Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends
This study deals with reactively compatibilized Polyamide 6 / High Density Polyethylene blends. More precisely, it focuses on the relationship between (1) the formulation, the processing parameters in corotating twin screw extrusion and (2) the morphologies and the microstructures of blends. Multi-s...
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Université Claude Bernard - Lyon I
2011
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Online Access: | http://tel.archives-ouvertes.fr/tel-00835910 http://tel.archives-ouvertes.fr/docs/00/83/59/10/PDF/TH2011_Fabre-Argoud_Alexandra.pdf |
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ndltd-CCSD-oai-tel.archives-ouvertes.fr-tel-008359102013-06-21T03:08:33Z http://tel.archives-ouvertes.fr/tel-00835910 2011LYO10242 http://tel.archives-ouvertes.fr/docs/00/83/59/10/PDF/TH2011_Fabre-Argoud_Alexandra.pdf Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends Argoud, Alexandra [SDV:AEN] Life Sciences/Food and Nutrition Polyamide Polyethylene Polymer blend Reactive compatibilization Extrusion Morphology Crystallization This study deals with reactively compatibilized Polyamide 6 / High Density Polyethylene blends. More precisely, it focuses on the relationship between (1) the formulation, the processing parameters in corotating twin screw extrusion and (2) the morphologies and the microstructures of blends. Multi-scale morphologies were observed by Scanning and Transmission Electron Microscopy. At the micron scale, the following morphologies were developed: nodular dispersions, stretched nodules and co-continuous morphology. As the processing conditions did not influence the types of morphology, the different morphological regions were reported in ternary diagrams. In the case of compatibilized blends, two mechanisms for morphology development have been proposed: (1) the compatibilization reaction, being very fast, leads to the formation of nano-dispersions by interfacial instabilities and (2) the standard break-up/coalescence mechanism of domains poor in copolymer could lead to the formation of morphologies up to the micron scale. Both the evolution of the largest size as a function of the composition and the distribution of sizes were modeled using percolation concepts. The stability of the morphologies was then studied either during static annealing or controlled shear or in a second step processing. The copolymer formed at the interface allows stabilizing the size of the morphologies. Finally, crystallization at lower temperature was observed by Differential Scanning Calorimetry when the polymers are confined in submicron domains. 2011-12-02 ENG PhD thesis Université Claude Bernard - Lyon I |
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language |
ENG |
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[SDV:AEN] Life Sciences/Food and Nutrition Polyamide Polyethylene Polymer blend Reactive compatibilization Extrusion Morphology Crystallization |
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[SDV:AEN] Life Sciences/Food and Nutrition Polyamide Polyethylene Polymer blend Reactive compatibilization Extrusion Morphology Crystallization Argoud, Alexandra Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
description |
This study deals with reactively compatibilized Polyamide 6 / High Density Polyethylene blends. More precisely, it focuses on the relationship between (1) the formulation, the processing parameters in corotating twin screw extrusion and (2) the morphologies and the microstructures of blends. Multi-scale morphologies were observed by Scanning and Transmission Electron Microscopy. At the micron scale, the following morphologies were developed: nodular dispersions, stretched nodules and co-continuous morphology. As the processing conditions did not influence the types of morphology, the different morphological regions were reported in ternary diagrams. In the case of compatibilized blends, two mechanisms for morphology development have been proposed: (1) the compatibilization reaction, being very fast, leads to the formation of nano-dispersions by interfacial instabilities and (2) the standard break-up/coalescence mechanism of domains poor in copolymer could lead to the formation of morphologies up to the micron scale. Both the evolution of the largest size as a function of the composition and the distribution of sizes were modeled using percolation concepts. The stability of the morphologies was then studied either during static annealing or controlled shear or in a second step processing. The copolymer formed at the interface allows stabilizing the size of the morphologies. Finally, crystallization at lower temperature was observed by Differential Scanning Calorimetry when the polymers are confined in submicron domains. |
author |
Argoud, Alexandra |
author_facet |
Argoud, Alexandra |
author_sort |
Argoud, Alexandra |
title |
Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
title_short |
Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
title_full |
Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
title_fullStr |
Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
title_full_unstemmed |
Control and stabilization of morphologies in reactively compatibilized Polyamide 6 / High Density Polyethylene blends |
title_sort |
control and stabilization of morphologies in reactively compatibilized polyamide 6 / high density polyethylene blends |
publisher |
Université Claude Bernard - Lyon I |
publishDate |
2011 |
url |
http://tel.archives-ouvertes.fr/tel-00835910 http://tel.archives-ouvertes.fr/docs/00/83/59/10/PDF/TH2011_Fabre-Argoud_Alexandra.pdf |
work_keys_str_mv |
AT argoudalexandra controlandstabilizationofmorphologiesinreactivelycompatibilizedpolyamide6highdensitypolyethyleneblends |
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1716589272978423808 |