Alkali solubility of carboxylated polymer emulsions

Muroi, Soichi; Hosoi, Keizo; Ishikawa, Toshihito

doi:10.1002/app.1967.070111013

Cited by 34 publications

(11 citation statements)

References 13 publications

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“…8 and 17.6 ( MPa) I/', and that of styrene-butadiene copolymer is between 16. 6 and 19.0 ( MPa)1/2,8,9 it is not surprising that solvent uptake should be improved by mixing y-BL with DME. We believe that the solvent permeated more into the intermixing region between the latex core and the polar compo-Representative complex impedance diagrams of the latex polymer electrolytes impregnated with y-BL are shown in Figure 2.…”

Section: Ionic Conductivity As a Function Of Solvent Content Lithiummentioning

confidence: 99%

Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Ichino

Matsumoto

Rutt

et al. 1993

J. Polym. Sci. A Polym. Chem.

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A new dual-phase solid polymer electrolyte system has been proposed. In this system, a network of ion pathways is formed in a low-polarity, host polymer matrix. A series of electrolytes were prepared from styrene-butadiene copolymer latices with dissolved lithium salts. Polymer films were formed from these latices, and then impregnated with y-butyrolactone ( y-BL) or y-butyrolactone/dimethoxyethane mixture ( y-BL/DME) , giving latex polymer electrolytes. The ionic conductivity of the polymer electrolyte system increased with increasing solvent content, although a distinct percolation threshold was not measured. Ionic conductivity also increased with the use of DME cosolvent, with the highest conductivity being 1.4 X S/cm. Complex impedance diagrams are discussed. The diagrams show significant deviations from the ideal. TEM /SEM observations are consistent with the desired dual-phase morphology. 0 1993 John Wiley & Sons, Inc.

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Section: Ionic Conductivity As a Function Of Solvent Content Lithiummentioning

confidence: 99%

Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Ichino

Matsumoto

Rutt

et al. 1993

J. Polym. Sci. A Polym. Chem.

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“…Since the alkali-swelling of carboxylated latex particles [1][2][3][4] has been extensively studied by both industrial and academic scientists in the past, it has been well understood that their alkali-swelling increases with increasing acid content and hydrophilicity of backbone polymers and decreases with increasing T g of backbone polymers and crosslink density of the whole polymers. According to these understandings, lightly carboxylated latex particles of high-T g polymers would not swell upon neutralization at room temperature, but would swell at high temperatures near their polymer T g s. Indeed, they were alkali-swellable at high temperatures; however, it was surprising to find out that these high-temperature alkali-swollen latex particles remained in their swollen state even after they were cooled down to room temperature.…”

Section: Introductionmentioning

confidence: 99%

Development of VOC-free, high-T g latex binders by a high-temperature water-extended latex technology

Lee

Chen

2007

J Coat Technol Res

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The potentiometric titration of carboxylated methyl methacrylate latexes prepared with varying amounts of methacrylic acid showed that only very small amounts of their total acids copolymerized were neutralized at room temperature until the acid level was well above 10%. However, it was found that all the acids copolymerized were completely titrated either in a 50/50 water/ethanol mixture at room temperature or in water at high temperatures near their backbone polymer T g s, regardless of their acid contents, as predicted from the existing theories on the alkaliswelling of carboxylated latexes. It was also found that these high-temperature alkali-swollen latex particles remained in the swollen state even after they were cooled down to room temperature and became filmforming at much lower temperatures. This discovery led to a new technology coined as a high-temperature water-extended latex technology. This new technology enabled us to develop VOC-free water-extended latexes of high-T g polymers that would exhibit good film formation at ambient temperature and turn into hard and non-blocking latex films and latex-bound pigmented coatings upon drying. Particularly, when fugitive bases were used for neutralization at high temperatures, the resulting water-extended latexes became hard, non-blocking, and water-resistant binders upon drying.

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“…The viscosity versus pH relationship for a large number of MAA‐containing emulsion polymers was studied by Verbrugge 14, 15. The alkali solubility of copolymers of MAA and AA with different comonomers such as EA, ethyl methacrylate (EMA), methyl methacrylate (MMA), and St was studied by Muroi et al16, 17 Alkali solubility was found to be dependent on the concentration of the acid component in the copolymer, water solubility of the nonacidic component, degree of polymerization, glass‐transition temperature ( T g ), chain configuration, and dissolution temperature. They reported that the dissolution behavior of MAA copolymers is better than that of AA copolymers and concluded that MAA units distributed more uniformly than AA in the polymer particles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and rheological studies of methacrylic acid–ethyl acrylate–diallyl phthalate copolymers

Jassal

Acharya

Bajaj

2003

J of Applied Polymer Sci

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Copolymerization of methacrylic acid (MAA) and ethyl acrylate (EA) was performed by the emulsion polymerization technique in the presence of a mixture of ionic and nonionic emulsifiers, at 85°C, using potassium persulfate as initiator (0.16 wt % of monomer). The molar ratio of MAA : EA varied between 44 : 56 and 54 : 46 in the monomer feed. Copolymers of MAA and EA were synthesized by incorporating diallyl phthalate (DAP) with varying concentrations (0 -1.7 mol % of total monomer) in the feed. A copolymer latex of MAA, EA, and DAP was also prepared by the variable feed process. The intrinsic viscosity and gel content were determined. Copolymers were characterized by IR and NMR spectroscopic techniques. The composition of copolymers was determined by 1 H-NMR spectra and sequential distribution from 13 C{ 1 H}-NMR spectra. The pH of the copolymer emulsion varied between 3 and 10 by addition of aqueous ammonia (23% w/w) and its effect on Brookfield viscosity was studied. The effects of copolymer composition, crosslinking agent concentration in the feed, monomer feed process, polymer solid contents, and shear rate on Brookfield viscosity were studied at pH ϳ 8.

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Alkali solubility of carboxylated polymer emulsions

Cited by 34 publications

References 13 publications

Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Development of VOC-free, high-T g latex binders by a high-temperature water-extended latex technology

Synthesis, characterization, and rheological studies of methacrylic acid–ethyl acrylate–diallyl phthalate copolymers

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