Effect of preparation method on the rheological behavior of waterborne polyurethane disperswion

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

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Two classes of environmentally-friendly Polyurethane dispersions have been prepared via prepolymer emulsification process and acetone process. Rheological behavior of these dispersions has been studied as functions of PU-concentration, degree of post-neutralization and temperature. At a critical volume fraction of PU (φ ∼0.43), a dramatic increase in the reduced zero shear viscosity was detected for the two dispersions. Co-occurrence of thermal-induced gelation and liquid-liquid phase separation was observed for the prepolymer process, while, only liquid-liquid phase separation was discovered both rheologically and morphologically for the acetone process.

Original languageEnglish (US)
Pages2366-2370
Number of pages5
StatePublished - Jul 10 2006
EventSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006 - Charlotte, NC, United States
Duration: May 7 2006May 11 2006

Other

OtherSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006
CountryUnited States
CityCharlotte, NC
Period5/7/065/11/06

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics

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