Rheology of a Semi‐Rigid Thermotropic Liquid Crystalline Polymer | Zendy

Somma E. | Zendy; Nobile M.R. | Zendy

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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.

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