caa a22 4500 378943936 CHVBK 20180305123659.0 cr unu---uuuuu 161128e20040101xx s 000 0 eng 10.1351/pac200476112027 doi (NATIONALLICENCE)gruyter-10.1351/pac200476112027 Rheological properties and associated structural characteristics of some aromatic polycondensates including liquid-crystalline polyesters and cellulose derivatives (IUPAC Technical Report) [Elektronische Daten] [J. L. White, L. Dong, P. Han, H. M. Laun] A comparative experimental study of shear-flow rheological properties of thermotropic polymer liquid crystals by eight different laboratories is described. The materials involved four different liquid-crystalline polyesters (LCPs), a glass- fiber-filled liquid-crystalline polyester,hydroxypropyl cellulose (HPC), and two non-liquid-crystalline high-temperature polymers, a poly(etheretherketone) (PEEK), and a polyarylate (PAR). Studies were made in both steady shear-flow and dynamic oscillatory experiments. The data from the various laboratories involved were compared. The level of agreement in the data was much less for most liquid-crystalline polymers than for similar isotropic melts. The Cox -Merz rule is valid for PEEK and PAR, but not for the LCPs and HPC. The occurrence of low levels of extrudate swell and high levels of uniaxial orientation in extrudates of the LCPs and HPC is described. © 2013 Walter de Gruyter GmbH, Berlin/Boston White J. L. aut Dong L. aut Han P. aut Laun H. M. aut Pure and Applied Chemistry De Gruyter 76/11(2004-01-01), 2027-2049 0033-4545 76:11<2027 2004 76 pac https://doi.org/10.1351/pac200476112027 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1351/pac200476112027 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- White J. L. aut NATIONALLICENCE 700 1- Dong L. aut NATIONALLICENCE 700 1- Han P. aut NATIONALLICENCE 700 1- Laun H. M. aut NATIONALLICENCE 773 0- Pure and Applied Chemistry De Gruyter 76/11(2004-01-01), 2027-2049 0033-4545 76:11<2027 2004 76 pac CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter