Associative thickener interactions with latex particles

Ma, Zeying; Kaczmarski, J. Philip; Glass, J. Edward

doi:10.1016/0033-0655(92)80012-l

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…Water-soluble polymers modified with relative low amount of a hydrophobic comonomer (<5 mol%) have been the subject of extensive research efforts during the past decade because of their interesting rheological behavior in aqueous solution [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Intermolecular associations give rise to enhanced viscosification properties.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] Some studies on hydrophobically modified alkali-soluble emulsion (HASE) polymers have recently been reported. [7][8][9][10][11][12] HASE polymer can be classified as a hydrophobically modified polyelectrolyte. When neutralized in aqueous solution with suitable base, the latex particles are ionized as a result of the acid-base reaction.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

et al. 2017

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The viscosity of hydrophobically modified alkali-soluble polymers to different hydrophobic macromonomer concentrations in the presence of various concentrations of anionic surfactant and salt were investigated. Associative polymers containing both ionic sites and small number of hydrophobic groups were prepared, and their thickening properties in aqueous solution were investigated. Solution polymerization was used for obtained the different polymers. Relationships between hydrophobe, sodium dodecyl sulfate (SDS) and salt (NaCl) concentrations are proposed. Owing to the competition between attractive hydrophobic interaction and repulsive electrostatic interactions, such hydrophobically modified polymers exhibit various rheological behaviors in aqueous solution depending on hydrophobic macromonomer, SDS and NaCl concentrations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

et al. 2017

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“…Depending on the nature of the additives, the thickening behavior can either decrease or increase. Over the last 20 years, most of the studies focused on the behavior of hydrophobically modified ethylene oxide urethane (HEUR) thickeners. − Some studies on hydrophobically modified alkali-soluble emulsion (HASE) polymers have recently been reported. − …”

Section: Introductionmentioning

confidence: 99%

Rheological Properties of Semidilute Hydrophobically Modified Alkali-Soluble Emulsion Polymers in Sodium Dodecyl Sulfate and Salt Solutions

2000

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The rheological properties of semidilute hydrophobically modified alkali-soluble emulsion polymers in the presence of 0.4 M NaCl and various concentrations of anionic surfactant were investigated. The viscosity profile consists of a zero-shear Newtonian region at low stresses and a shear-thickening region at intermediate stresses, followed by a catastrophic decrease in the viscosity at moderate to high stresses. The viscosity and the dynamic modulus peaked at c/cmc of ∼11, in contrast to 1 in the absence of NaCl. The activation energies determined at the zero-shear and the shear-thickening regime (denoted by Ea0 and Ea,max respectively) increase to a maximum and subsequently decrease as a function of surfactant concentration. Two critical SDS concentrations defined by the crossover of the Ea curves (at ∼0.001 and 0.009 M SDS) are related to the balance in the inter-and intramolecular association.

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“…In recent years, water‐soluble associative polymers are gaining importance as thickeners or rheology modifiers in a number of waterborne applications. Associative thickeners are water‐soluble polymers containing hydrophobic moieties (alkyl chains), such as hydrophobically modified ethylene oxide urethane block copolymer (HEUR), whereby alkyl chains are grafted at both ends of poly(ethylene glycol) (PEG) chains, hydrophobically modified alkali‐soluble emulsion and hydrophobically modified hydroxy ethylcellulose . The macromolecules of these associative polymers can form a network‐like structure when dissolved in water, thereby producing interesting rheological behavior.…”

Section: Introductionmentioning

confidence: 99%

Cationic brush‐like terpolymer with pH responsive thickening behavior in a surfactant system

Zhang

2014

Polymer International

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A new kind of cationic brush-like terpolymer was synthesized by copper(I)-mediated atom transfer radical polymerization (ATRP) of methyl ether poly(ethylene glycol) methacrylate (mPEGMA), poly(propylene glycol) methacrylate (PPGMA) and dimethylaminoethyl methacrylate (DMAEMA) in the presence of ethyl -bromoisobutyrate as ATRP initiator. The poly(PEG/PPG/DMAEMA) terpolymer was featured with a cationic backbone containing PDMAEMA segments and amphiphilic side chains composed of hydrophilic PEG and hydrophobic PPG short branches. The copolymer was characterized by 1 H NMR, Fourier transform IR and gel permeation chromatography. The thickening behavior of this copolymer in a surfactant system (sodium dodecyl sulfate, SDS) was extensively investigated by a rheological study. It was found that the copolymer can effectively thicken the SDS surfactant system at low concentrations of both copolymer and surfactant. More interestingly, the thickened SDS system by this copolymer showed dramatic pH responsive rheological behavior in the pH range 4-10. Thus the rheological behavior of the thickened SDS system was tunable by pH value. Based on our findings, a novel thickening mechanism is proposed for this kind of cationic brush-like terpolymer. This kind of cationic brush-like copolymer would be a new type of rheology modifier for advanced hair/skin care systems.

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Associative thickener interactions with latex particles

Cited by 12 publications

References 8 publications

Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

Rheological Properties of Semidilute Hydrophobically Modified Alkali-Soluble Emulsion Polymers in Sodium Dodecyl Sulfate and Salt Solutions

Cationic brush‐like terpolymer with pH responsive thickening behavior in a surfactant system

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