Premium
Rheology of a Semi‐Rigid Thermotropic Liquid Crystalline Polymer
Author(s) -
Somma E.,
Nobile M.R.
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551006
Subject(s) - thermotropic crystal , rheology , materials science , viscoelasticity , rheometry , dynamic modulus , shear modulus , polymer , composite material , dynamic mechanical analysis , shear thinning , thermodynamics , liquid crystalline , physics
In this work the rheological behaviour of different M w samples of a thermotropic liquid crystalline polymer (TLCP), the random copolymer HBA/HNA 73/27 produced by Ticona, has been investigated. The linear viscoelastic behavior has been discussed. The G′ (shear storage modulus) and G″ (shear loss modulus) have been monitored as a function of frequency and of different annealing times. Rheological data obtained in steady state conditions have been used to define the viscosity flow curves for the different M W samples. In all the cases a three regions flow curve has been detected, with the plateau zone being M w dependent.