Rheological behavior of aqueous polyurethane dispersions: Effects of solid content, degree of neutralization, chain extension, and temperature

Samy A. Madbouly; Joshua U. Otaigbe; Ajaya K. Nanda; Douglas A. Wicks

doi:10.1021/ma050453u

Rheological behavior of aqueous polyurethane dispersions: Effects of solid content, degree of neutralization, chain extension, and temperature

Samy A. Madbouly, Joshua U. Otaigbe, Ajaya K. Nanda, Douglas A. Wicks

School of Engineering (Behrend)

Research output: Contribution to journal › Article › peer-review

91 Scopus citations

Abstract

Rheological behavior of waterborne polyurethane (PU) dispersion was investigated with small-amplitude oscillatory shear flow experiments. The rheological properties of these environmentally friendly dispersions were found to be dependent on composition and degree of postneutralization. The complex viscosity of the polyurethane dispersions increased at critical concentration of polyurethane, below which the viscosity increased slightly with composition. The results indicate a number of similarities to critical gelling gelling systems, indicating that a more complicated theory that explicitly takes the intrinsic interaction, concentration, and size distribution of the PU.

Original language	English (US)
Pages (from-to)	4014-4023
Number of pages	10
Journal	Macromolecules
Volume	38
Issue number	9
DOIs	https://doi.org/10.1021/ma050453u
State	Published - May 3 2005

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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AU - Madbouly, Samy A.

AU - Otaigbe, Joshua U.

AU - Nanda, Ajaya K.

AU - Wicks, Douglas A.

PY - 2005/5/3

Y1 - 2005/5/3

N2 - Rheological behavior of waterborne polyurethane (PU) dispersion was investigated with small-amplitude oscillatory shear flow experiments. The rheological properties of these environmentally friendly dispersions were found to be dependent on composition and degree of postneutralization. The complex viscosity of the polyurethane dispersions increased at critical concentration of polyurethane, below which the viscosity increased slightly with composition. The results indicate a number of similarities to critical gelling gelling systems, indicating that a more complicated theory that explicitly takes the intrinsic interaction, concentration, and size distribution of the PU.

AB - Rheological behavior of waterborne polyurethane (PU) dispersion was investigated with small-amplitude oscillatory shear flow experiments. The rheological properties of these environmentally friendly dispersions were found to be dependent on composition and degree of postneutralization. The complex viscosity of the polyurethane dispersions increased at critical concentration of polyurethane, below which the viscosity increased slightly with composition. The results indicate a number of similarities to critical gelling gelling systems, indicating that a more complicated theory that explicitly takes the intrinsic interaction, concentration, and size distribution of the PU.

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Rheological behavior of aqueous polyurethane dispersions: Effects of solid content, degree of neutralization, chain extension, and temperature

Abstract

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