caa a22 4500 465813976 CHVBK 20180323112122.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF01329298 doi (NATIONALLICENCE)springer-10.1007/BF01329298 Marrucci G. Dipartimento die Ingegneria Chimica, University of Naples, Piazzale Tecchio, 80125, Napoli, Italy aut Rheology of rodlike polymers in the nematic phase with tumbling or shear orientation [Elektronische Daten] [G. Marrucci] The theory of rodlike polymers in the nematic phase is now sufficiently well developed as to allow predictions of the rheological behaviour that qualitatively compare well with the experimental observations. One of the main results of the theory is the prediction that rodlike polymers are nematics of the tumbling type at low shear rates, whereas they become shear oriented at high rates: a nonlinear effect, which is absent in low molecular weight nematics. This aspect is here reviewed in an effort to highlight the intuitive aspects of the matter. First, the low shear-rate situation is discussed in order to investigate the conditions that determine the existence of a stationary solution as opposed to a periodic one (tumbling). Then, the high shear-rate range is considered, where the shear-oriented situation prevails under all conditions. The intermediate range of shear rates is the most interesting one for its peculiar rheological behavior. Steinkopff, 1990 Tumbling nationallicence shear orientation nationallicence rodlike polymers nationallicence nematics nationallicence Rheologica Acta Steinkopff-Verlag 29/6(1990-11-01), 523-528 0035-4511 29:6<523 1990 29 397 https://doi.org/10.1007/BF01329298 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01329298 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Marrucci G. Dipartimento die Ingegneria Chimica, University of Naples, Piazzale Tecchio, 80125, Napoli, Italy aut NATIONALLICENCE 773 0- Rheologica Acta Steinkopff-Verlag 29/6(1990-11-01), 523-528 0035-4511 29:6<523 1990 29 397 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer