Impact of functional group distribution on the adsorption of a polymeric dispersant

Soga, Iwao

doi:10.1007/bf02697721

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Adsorbed polymer–substrate interactions usually lead to differences in properties of bulk and adsorbed polymers. − Interactions between adsorbed polymers and solid surfaces have been shown to provide advantageous physical, mechanical, and thermal properties, making these materials suitable as lubricants, adhesives, coatings, and corrosion-resistant agents. − These properties are closely related to those that determine the glass transition, which for small amounts of adsorbed polymers depend on film thickness, polymer molecular mass, intermolecular interactions, and the mobility of macromolecular chains. − For example, the T g will be elevated if the interactions between the polymers and the substrate are attractive and strong . Strong attractive interactions, covalent or hydrogen bonding, between polymer segments and the substrate can potentially reduce the mobility of the adsorbed polymer segments.…”

Section: Introductionmentioning

confidence: 99%

Structure of the Interfacial Region in Adsorbed Poly(vinyl acetate) on Silica

2015

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We performed a combined calorimetric and molecular modeling investigation of poly(vinyl acetate) (PVAc) on silica to characterize the intermolecular interactions and the behavior of the adsorbed polymer. From temperature-modulated differential scanning calorimetry experiments, different regions of thermal activity suggested a gradient of mobility in the adsorbed polymer. Polymer segments in more direct contact with silica (tightly bound) showed a significantly elevated and broadened glass transition relative to the bulk polymer, while polymer further away (loosely bound) showed only a slightly elevated transition relative to the bulk polymer. A thermal transition for PVAc at the air interface (more-mobile) was also observed and was at lower temperatures than the bulk polymer. Density profiles from molecular dynamics studies suggested a structure of the adsorbed polymer similar to that experimentally observed. These studies were consistent with the presence of a motional gradient in the polymer segments, and concomitant glass transition changes from the silica to the air interfaces. These results also demonstrate that hydrogen-bonding interactions, at the PVAc/silica interface, are critical to the high-temperature shifts in the glass transition. ■ INTRODUCTIONAdsorbed polymer−substrate interactions usually lead to differences in properties of bulk and adsorbed polymers. 1−10 Interactions between adsorbed polymers and solid surfaces have been shown to provide advantageous physical, mechanical, and thermal properties, making these materials suitable as lubricants, adhesives, coatings, and corrosion-resistant agents. 11−17 These properties are closely related to those that determine the glass transition, which for small amounts of adsorbed polymers depend on film thickness, polymer molecular mass, intermolecular interactions, and the mobility of macromolecular chains. 18−20 For example, the T g will be elevated if the interactions between the polymers and the substrate are attractive and strong. 21 Strong attractive interactions, covalent or hydrogen bonding, between polymer segments and the substrate can potentially reduce the mobility of the adsorbed polymer segments. This reduction in mobility due to restrictions from attachment points has been proposed as the main reason for T g elevation. 22−24 Differential scanning calorimetry (DSC) is the most common technique used to investigate thermal characteristics of bulk polymers and composites. 25−27 Temperature-modulated DSC (TMDSC) is a variant of DSC that, in addition to providing the same information as conventional DSC, provides additional insight into the thermal behavior of materials by separating the heat flow data into reversing and nonreversing events. 28,29 TMDSC and its derivatives have been used to resolve both weak and multicomponent transitions that would be difficult to distinguish in a conventional DSC scan. 30−34 Molecular dynamics (MD) simulations have also been used to investigate the dynamics and thermodynamics of thin-film polymer coatings. 35−5...

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Section: Introductionmentioning

confidence: 99%

Structure of the Interfacial Region in Adsorbed Poly(vinyl acetate) on Silica

2015

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“…Printing density is an important parameter used to evaluate the picture quality, which could affect color gamut, color fidelity and the final visual effects. In general, the higher printing density is, the truer color is [7,8]. The printing density is usually used to appraise the printing quality.…”

Section: Printing and Testing The Printing Qualitymentioning

confidence: 99%

Research on Modification of Bentonite and its Printing Quality when Used in Color Ink-Jet Paper

Yang

Gao

Liu

2011

AMM

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In order to know the application of bentonite in color ink-jet paper, an acid bentonite was prepared by modifying with sulphuric acid. Both of sodium bentonite and acid bentonite were characterized and evaluated with scanning electron microscope. The study result from printing quality testing showed that if the formulation of acid bentonite, under the dosage of 35% PVA and PDMDAAC 3% respectively, was used as the pigment, the print effect could be better.

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“…The properties of the color ink-jet paper mainly depend on the coating performances, specially the properties of pigments and adhesives [1,2,3,4,5]. Usually, the pigments for the color ink-jet paper should have small particle size, high specific surface and oil absorption quantity [6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Preparing the Coating of Color Ink-Jet Paper and Investigating its Printing Quality

Yang

Liu

2013

AMM

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In order to know the coating effect and application of color ink-jet paper, the coating formula and printing quality of ink-jet paper were deeply studied. First of all, the coating liquid was prepared by dispersing and mixing the nanometer pigment, the adhesive and the other additives. Then the properties of ink-jet paper were tested and their surface profiles were characterized and evaluated with scanning electron microscope. Finally, the coating paper samples and the base papers were all printed with color ink-jet printer and measured with a spectrodensitometer. The study result showed that it can gain well coating and printing quality when the ratio of SiO2and TiO2is 3:1 and the content of PVA adhesive is 50%, especially paper whiteness is obviously higher than that before the coating.

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Impact of functional group distribution on the adsorption of a polymeric dispersant

Cited by 3 publications

References 5 publications

Structure of the Interfacial Region in Adsorbed Poly(vinyl acetate) on Silica

Structure of the Interfacial Region in Adsorbed Poly(vinyl acetate) on Silica

Research on Modification of Bentonite and its Printing Quality when Used in Color Ink-Jet Paper

Preparing the Coating of Color Ink-Jet Paper and Investigating its Printing Quality

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