Quantitative predictions of linear viscoelastic rheological properties of entangled polymers

摘要: The “dual constraint” model developed by Mead, Van Dyke et al. is here extended inclusion of “early-time” contour-length fluctuations and constraint-release Rouse relaxation, then evaluated comparing its predictions with literature data for over 50 different linear star polymers. By combining the reptation Doi Edwards constraint release, provides a systematic approach to prediction rheological properties parameters are taken from used consistently polymers, their mixtures having same chemical compositions. In most cases, appears agree well monodisperse, bidisperse, polydisperse except at low molecular weights.