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| Description
| - Předmětem článku je studium viskoelastického chování systémů na bázi práškové plnivo-polymerní pojivo. Byly použity dva typy pojiva: B1 obsahující parafinový vosk, polyetylen, etylen/butyl akrylátový kopolymer, a B2 skládající se z polypropylenu, parafinového vosku, carnauba vosku a kyseliny stearové. Dynamické tokové vlastnosti, měřené na rotačním reometru deska-deska, jsou silně ovlivněny koncentrací karbidového prášku (20-55 vol.%). Dále bylo zjištěno, že viskoelastické parametry vysoce koncentrovaných směsí jsou závislé na deformaci, a to i pro malé hodnoty amplitud. Srovnání reologických charakteristik získaných při měření v ustáleném a oscilačním smykovém režimu potvrdilo relativně dobrou shodu s Cox-Merz pravidlem. (cs)
- Viscoelastic behaviour of hard-metal carbide powders dispersed in two different polymeric matrices is studied in a parallel discs rheometer. The first binder (B1) consisted of paraffin wax, polyethylene and ethylene/butyl acrylate copolymer, the second (B2) contained polypropylene, paraffin wax, carnauba wax and stearic acid. Dynamic functions are strongly affected by the concentration of carbide powder (20-55 vol. %), exhibiting yield at high solids loading. Yield values were found to be an exponential function of the powder content. Furthermore, it was found that the viscoelastic parameters of highly concentrated compounds are strain dependent, even when subjected to small strain amplitudes. The B2 lower very effectively both, dynamic viscosity and storage modulus, of the 20 - 50 vol. % carbide powder compounds. Nevertheless, at 55 vol. % the cause of the viscoelastic functions is governed by powder characteristics, regardless of the polymer binder used. A comparison of the dynamic and complex visco
- Viscoelastic behaviour of hard-metal carbide powders dispersed in two different polymeric matrices is studied in a parallel discs rheometer. The first binder (B1) consisted of paraffin wax, polyethylene and ethylene/butyl acrylate copolymer, the second (B2) contained polypropylene, paraffin wax, carnauba wax and stearic acid. Dynamic functions are strongly affected by the concentration of carbide powder (20-55 vol. %), exhibiting yield at high solids loading. Yield values were found to be an exponential function of the powder content. Furthermore, it was found that the viscoelastic parameters of highly concentrated compounds are strain dependent, even when subjected to small strain amplitudes. The B2 lower very effectively both, dynamic viscosity and storage modulus, of the 20 - 50 vol. % carbide powder compounds. Nevertheless, at 55 vol. % the cause of the viscoelastic functions is governed by powder characteristics, regardless of the polymer binder used. A comparison of the dynamic and complex visco (en)
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| Title
| - Viskoelastické chování PIM materiálů (cs)
- Viscoelastic Properties of Powder Injection Molding Compounds
- Viscoelastic Properties of Powder Injection Molding Compounds (en)
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| skos:prefLabel
| - Viskoelastické chování PIM materiálů (cs)
- Viscoelastic Properties of Powder Injection Molding Compounds
- Viscoelastic Properties of Powder Injection Molding Compounds (en)
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| skos:notation
| - RIV/70883521:28110/04:63502475!RIV/2005/MSM/281105/N
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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/70883521:28110/04:63502475
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - PIM technology; highly filled polymers; viscoelastic properties; yield; Cox-Merz rule (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
| - JOURNAL OF POLYMER MATERIALS
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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...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Kitano, Takeshi
- Sáha, Petr
- Hausnerová, Berenika
- Honek, Tomáš
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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