Rod-climbing in a particle-suspended polymeric liquid

The rod-climbing experiment and its relationship to the first normal stress difference of kaolinite particle-suspended polyisobutylene (PIB)/polybuten e (PB) systems possessing Boger fluid characteristics (no shear-thinning an d highly elastic) were investigated. The rod-climbing constants of the kaol inite/PIB/PB system obtained from the second-order fluid model increased wi th particle concentration and PIE molecular weight, indicating that the ela sticity of the PIB/PB increases as kaolinite particle concentration increas es. The first normal stress difference obtained from the rod-climbing const ant is also correlated with that measured value using RMS-800, a mechanical spectrometer, for the particle-suspended PIB/PB system. (C) 2000 John Wile y & Sons, Inc.