Rod-climbing in a particle-suspended polymeric liquid

Abstract

The rod-climbing experiment and its relationship to the first normal stress difference of kaolinite particle-suspended polyisobutylene (PIB)/polybutene (PB) systems possessing Boger fluid characteristics (no shear-thinning and highly elastic) were investigated. The rod-climbing constants of the kaolinite/PIB/PB system obtained from the second-order fluid model increased with particle concentration and PIB molecular weight, indicating that the elasticity of the PIB/PB increases as kaolinite particle concentration increases. The first normal stress difference obtained from the rodclimbing constant is also correlated with that measured value using RMS-800, a mechanical spectrometer, for the particle-suspended PIB/PB system.

Preparation and Rheological Characteristics of Solvent-Cast Poly(ethylene oxide)/Montmorillonite Nanocomposites

“…On the other hand, inorganic particles have been extensively used as reinforcement materials for conventionally filled polymers. [14,15] In this paper, the organophilically treated MMT (OMMT) and poly(ethylene oxide) (PEO) were intercalated by the solvent casting method using chloroform as a cosolvent, where the pristine sodium montmorillonite (Na + -MMT) has been made organophilic by cation exchange reaction with an organophilic modifier. The solvent casting method, [16] has also been adopted to produce poly(l-lactide) (PLLA)-MMT and poly(e-caprolactone) (PCL)-MMT intercalated nanocomposites.…”