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| Description
| - In this study, attention is directed towards the abilities of elongational flow to induce the chain orientation and, as a consequence, to improve the properties of extruded profiles. A novel-designed extrusion die with semihyperbolic convergency of the channel, by which a high percentage of elongational flow in the melt is generated, was connected with a conventional single-screw extruder. Commercial grades of high-density polyethylene and isotactic polypropylene were used as model commodity polymers. Round extrudates prepared by this processing line were assessed as self-reinforced products. Detailed structural observation carried out with the aid of scanning electron microscopy and wide-angle X-ray scattering evidenced that the structure of extruded rods is uniquely fibrous and highly oriented throughout the profile. As a result, the selfreinforced extrudates possess outstanding storage modulus in a wide range of temperatures and considerably higher melting point and fusion heat than rods produc
- In this study, attention is directed towards the abilities of elongational flow to induce the chain orientation and, as a consequence, to improve the properties of extruded profiles. A novel-designed extrusion die with semihyperbolic convergency of the channel, by which a high percentage of elongational flow in the melt is generated, was connected with a conventional single-screw extruder. Commercial grades of high-density polyethylene and isotactic polypropylene were used as model commodity polymers. Round extrudates prepared by this processing line were assessed as self-reinforced products. Detailed structural observation carried out with the aid of scanning electron microscopy and wide-angle X-ray scattering evidenced that the structure of extruded rods is uniquely fibrous and highly oriented throughout the profile. As a result, the selfreinforced extrudates possess outstanding storage modulus in a wide range of temperatures and considerably higher melting point and fusion heat than rods produc (en)
- V této studii je věnována pozornost možnosti elongačního toku indukovat orientaci řetězců a následně zlepšení vlastností vytlačovaných profilů. Nově navržená hlava se semihyperbolickým kanálem, díky kterému je dosahováno výrazného elongačního toku, byla spojena s konvečním jednošnekovým extruderem. Komerčně dostupný vysokohustotní polyetylen a izotaktický polypropylen byly použity jako modelové komoditní polymery. Vytlačené profily byly zjištěny jako samovyztužené. Detailní studie pomocí elektronové mikroskopie a rentgenografie ukázala, že struktura profilů je fibrilární a vysoce orientovaná. Důsledkem toho mají samovyztužené profily vysoký soufázový modul v širokém rozsahu teplot a významně vyšší teplotu a teplo tání v porovnání s běžnými extrudáty. (cs)
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| Title
| - Self-reinforcement of polymers as a consequence of elongational flow
- Samovyztužení jako důledek elongačního toku (cs)
- Self-reinforcement of polymers as a consequence of elongational flow (en)
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| skos:prefLabel
| - Self-reinforcement of polymers as a consequence of elongational flow
- Samovyztužení jako důledek elongačního toku (cs)
- Self-reinforcement of polymers as a consequence of elongational flow (en)
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| skos:notation
| - RIV/70883521:28110/06:63504448!RIV07-GA0-28110___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/70883521:28110/06:63504448
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Flow-induced crystallization . Fibrous structure . High-density polyethylene . Isotactic polypropylene . High-strength extrudates (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Commereuc, Sophie
- Habrová, Veronika
- Verney, Vincent
- Čermák, Roman
- Obadal, Martin
- Stoklasa, Karel
- Fraisse, Frederic
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| http://localhost/t...ganizacniJednotka
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| is http://linked.open...avai/riv/vysledek
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