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Effect of "hard" comonorners styrene and methyl methacrylate in ethyl acrylate/acrylic acid latices on their thickening with associative thickener
Authors: Quadrat Otakar | Šňupárek Jaromír | Horský Jan | Mikešová Jana
Year: 2005
Type of publication: článek v odborném periodiku
Name of source: Colloids and Surfaces A-Physiochemical and Engineering Aspects
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 163-168
Titles:
Language Name Abstract Keywords
cze Vliv "tvrdých" komonomerů styrenu a methylmethakrylátu v latexech na bázi kopolymerů ethylakrylát / kyselina akrylová na jejich zahušťování asociativními zahušťovadly Byl studován vliv "tvrdých" komonomerů styrenu a methylmethakrylátu v latexech na bázi kopolymerů ethylakrylát / kyselina akrylová na jejich zahušťování asociativními zahušťovadly. Byl prokázán významný hydrozobizující účinek kopolymerovaného styrenu.
eng Effect of "hard" comonorners styrene and methyl methacrylate in ethyl acrylate/acrylic acid latices on their thickening with associative thickener The rheological study of acrylate latices showed that an important factor influencing thickening with hydrophobically ethoxylated urethane (HEUR) associative thickeners is the effective hydrodynamic volume of latex particles, which in concentrated latices controls the remaining volume available for the thickener macromolecules. Thus, the larger volume corresponding to a smaller size of alkalinized swollen particles of ethyl acrylate/acrylic acid copolymers with "hard" comonomers methyl methacrylate or styrene leads to lower density of network structure of the thickener bridging the latex particles and, consequently, to lower viscoelasticity of the thickened material. (C) 2004 Elsevier B.V. All rights reserved. latices; acrylic copolymers containing styrene or methyl methacrylate groups; thickening; associative thickener