The coagulation mechanism of heat sensitive latices

Goossens, J. W. S.; Vogt, Helmut

doi:10.1016/0166-6622(90)80137-s

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Bayer was the first to introduce a class of responsive copolymers that conferred temperature-induced coagulation of latexes. Goossens and Vogt [10] investigated the mechanism for temperatureinduced gelation of butadiene-acrylonitrile latexes using coagulant AW. That copolymer is typical of the commercial heat sensitisers available and is a polyetherpolysiloxane.…”

Section: Introductionmentioning

confidence: 99%

Polymer stabilisers for temperature-induced dispersion gelation: Versatility and control

Alava

Saunders

2006

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Polymer stabilisers for temperature-induced dispersion gelation: Versatility and control

Alava

Saunders

2006

Journal of Colloid and Interface Science

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“…

systems is increased significantly due to the presence of water. These costs could be markedly reduced by removing water and transporting a highly concentrated latex, followed by addition of the water and restoration of the initial latex solid content before end-use.Latex destabilization/sedimentation can be implemented by several methods such as centrifugation, [4] heating, [5] or changing the state of the continuous phase by boiling/freezing the water. [6] However, the most common approach involves the addition of coagulation agents such as solvents, [7] salts, [8] polyelectrolytes, [9,10] or surfactants with opposite charges.

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mentioning

confidence: 99%

“…Latex destabilization/sedimentation can be implemented by several methods such as centrifugation, [4] heating, [5] or changing the state of the continuous phase by boiling/freezing the water. [6] However, the most common approach involves the addition of coagulation agents such as solvents, [7] salts, [8] polyelectrolytes, [9,10] or surfactants with opposite charges.…”

mentioning

confidence: 99%

Reversible Destabilization of UV‐Responsive Polymer Particles (Latex) using a Photoresponsive Surfactant

Jasinski

Guimarães

David

et al. 2019

Macromol. Rapid Commun.

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Production of aqueous dispersions of polymeric nanoparticles via heterogeneous radical polymerization in emulsion‐type systems is of enormous commercial importance. The ability to reversibly destabilize such a latex is highly desirable, for example, to save transportation costs. Herein, a method for synthesis of photo‐responsive polymer latexes that can be destabilized (leading to sedimentation) by only using UV irradiation (no addition of chemicals or change in the experimental conditions) and subsequently redispersed by stirring under visible light irradiation is described. The destabilization/redispersion mechanism relies on photoinduced trans‐cis isomerization of the cationic diazene surfactant 2‐(4‐(4‐butylphenyl)diazenylphenoxy)ethyltrimethylammonium bromide (C4AzoTAB) used in conjunction with the anionic surfactant sodium dodecyl sulfate. It is demonstrated that reversible destabilization can be achieved very rapidly (90 s residence time) employing continuous flow technology.

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