Morphology and properties of mixed anion ionomers

Visser, Susan A.; Cooper, Stuart L.

doi:10.1016/0032-3861(92)90365-4

Cited by 22 publications

(20 citation statements)

References 37 publications

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“…The preparation of polyurethane dispersions by the prepolymer mixing process has received some attention in the literature [16][17][18][19][20][21][22][23][24][25][26]. In this process, a medium molecular weight polymer (the prepolymer) is synthesized by the reaction of suitable diols or polyols (usually polyether or polyester macrodiols) with a molar excess of diisocyanates or polyisocyanates.…”

Section: Introductionmentioning

confidence: 99%

The influence of the ionic concentration, concentration of the polymer, degree of neutralization and chain extension on aqueous polyurethane dispersions prepared by the acetone process

Nanda

Wicks

2006

Polymer

171

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Section: Introductionmentioning

confidence: 99%

The influence of the ionic concentration, concentration of the polymer, degree of neutralization and chain extension on aqueous polyurethane dispersions prepared by the acetone process

Nanda

Wicks

2006

Polymer

171

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“…The presence of the ionic species has a considerable effect on the physical properties, 13 and it is rea-sonable to suppose that the interactions between ions and their counterions are responsible for these effects. 14 -16 It has been discovered that the degree of neutralization, 10 the type of ionic component, 17 and the counterion 18 used all contribute significantly to the properties of PU ionomers. Aqueous dispersions of PU ionomers are now one of the most rapidly developing and active branches of PU chemistry.…”

Section: Introductionmentioning

confidence: 99%

The influence of the degree of neutralization, the ionic moiety, and the counterion on water-dispersible polyurethanes

Hourston

Williams

Satguru

et al. 1999

J. Appl. Polym. Sci.

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A number of polyurethane anionomers based on isophorone diisocyanate, polytetrahydrofuran, and cyclohexane dimethanol were prepared as aqueous dispersions. The dispersions were stabilized by the use of an internal emulsifier. The principal ionic moiety used was dimethylol propanoic acid, but dimethylol butanoic acid and an experimental suphonate diol sodium salt were also used. The consequence of the neutralization step, the degree of neutralization, the type of ionic component, and the type of counterion were investigated for their effect on the mechanical and colloidal properties of the polyurethanes. Dynamic mechanical thermal analysis, tensiometry, solvent spot testing, and swelling studies were used for the characterization of the materials.

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“…The pendant carboxylic acid groups are neutralized with a base to form internal salt‐group‐containing prepolymers that can easily be dispersed in water. The degree of neutralization, the counterion7–9, and the type of ionic component10 contribute significantly to the properties of PU ionomers. In general, properties such as adhesion, toughness, tear strength, and abrasion resistance are improved by ionization.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of waterborne poly(urethane urea)s for adhesives: The effects of the 2,2‐bis(hydroxylmethyl)propionic acid content on the properties

Kwak

Kim

Yoo

et al. 2004

J of Applied Polymer Sci

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A series of waterborne poly(urethane urea)s (WBPUs) containing various concentrations (8.3-15.5 mol %) of 2,2-bis(hydroxylmethyl)propionic acid (DMPA) were prepared from isophorone diisocyanate, poly(tetramethylene adipate) glycol, DMPA, ethylenediamine, and triethylamine. The length of the hard segment with the DMPA content was varied from 18.7 to 22.6 wt % at a fixed soft-segment length (2000 g/mol). The effect of the DMPA content on the colloidal properties of WBPU dispersions, the hydrogen-bonding index, water swelling, dynamic mechanical thermal properties, and mechanical properties of WBPU films, and the adhesive strengths of substrates such as chloroprene rubber (CR)/CR, CR/polyurethane foam, CR/ethylene vinyl acetate foam, and thermoplastic olefin sheet/polypropylene foam were investigated. Stable aqueous dispersions of WBPU were obtained when the DMPA concentration was greater than 10 mol %. As the DMPA content increased, the particle size of the WBPU dispersion decreased, but the viscosity of the WBPU dispersion increased. The hydrogenbonding fraction, water swelling, dynamic storage modulus and relaxation temperature, and tensile strength of the films increased with increasing DMPA content. According to an adhesion test, the substrates adhering to WBPU with greater than 10 mol % DMPA tore at about 8.0 kgf/cm 2 instead of breaking the adhered region. These results suggested that the WBPUs prepared in this study could have potential for adhesive use.

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Morphology and properties of mixed anion ionomers

Cited by 22 publications

References 37 publications

The influence of the ionic concentration, concentration of the polymer, degree of neutralization and chain extension on aqueous polyurethane dispersions prepared by the acetone process

The influence of the ionic concentration, concentration of the polymer, degree of neutralization and chain extension on aqueous polyurethane dispersions prepared by the acetone process

The influence of the degree of neutralization, the ionic moiety, and the counterion on water-dispersible polyurethanes

Preparation and properties of waterborne poly(urethane urea)s for adhesives: The effects of the 2,2‐bis(hydroxylmethyl)propionic acid content on the properties

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