Viscoelastic Behaviour of Butyl Acrylate/Styrene/2-Hydroxyethyl Methacrylate/Acrylic Acid Latices Thickened with Associative Thickeners

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F03%3A00000583" target="_blank" >RIV/00216275:25310/03:00000583 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Viscoelastic Behaviour of Butyl Acrylate/Styrene/2-Hydroxyethyl Methacrylate/Acrylic Acid Latices Thickened with Associative Thickeners

Popis výsledku v původním jazyce

The rheological behaviour of butyl acrylate/styrene/crylic acid latices thickened with a hydrophobically modified ethoxylated polyurethane (HEUR) or hydrophobically modified alkali-soluble polyacrylate emulsion (HASE) was investigated. While the pseudoplastic character of frequency dependence of complex viscosity was similar for both thickeners, viscoelastic behavuour, expresed as the ratio of loss and storage moduli, significantly different, indicating that the HEUR molecules, unlike swollen HASE particles, create a viscoelastic space structure. The increase in hydrophilicity of the particle surface, achieved by incorporation of 2-hydroxyethyl methacrylate (HEMA) monomer into the latex copolymer reduced the viscoelasticity of latices thickened with HEUR, but not of those thickened with HASE. This confirms that adsoption of hydrophobic end-groups on particle surface is imposrtant for thickening of latices with HEUR and that a physical network of latex particles interconnected by the th

Název v anglickém jazyce

Viscoelastic Behaviour of Butyl Acrylate/Styrene/2-Hydroxyethyl Methacrylate/Acrylic Acid Latices Thickened with Associative Thickeners

Popis výsledku anglicky

The rheological behaviour of butyl acrylate/styrene/crylic acid latices thickened with a hydrophobically modified ethoxylated polyurethane (HEUR) or hydrophobically modified alkali-soluble polyacrylate emulsion (HASE) was investigated. While the pseudoplastic character of frequency dependence of complex viscosity was similar for both thickeners, viscoelastic behavuour, expresed as the ratio of loss and storage moduli, significantly different, indicating that the HEUR molecules, unlike swollen HASE particles, create a viscoelastic space structure. The increase in hydrophilicity of the particle surface, achieved by incorporation of 2-hydroxyethyl methacrylate (HEMA) monomer into the latex copolymer reduced the viscoelasticity of latices thickened with HEUR, but not of those thickened with HASE. This confirms that adsoption of hydrophobic end-groups on particle surface is imposrtant for thickening of latices with HEUR and that a physical network of latex particles interconnected by the th

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Comptes Rendus Chimie

ISSN

1631-0748

e-ISSN

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Svazek periodika

Neuveden

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

6

Strana od-do

1411-1416

Kód UT WoS článku

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EID výsledku v databázi Scopus

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