Title :
Field-induced changes in the viscoelastic properties of polyethylene
Author :
Jones, J.P. ; Lewis, T.J. ; Llewellyn, J.P.
Author_Institution :
Sch. of Informatics, Wales Univ., Bangor, UK
Abstract :
Measurements are reported on the influence of electric fields on the viscoelastic shear moduli of polyethylene films using a sensitive quartz crystal sensor technique. Marked effects are found that are attributed to field-induced conformational changes in the amorphous phase of the polymer. The change begins at fields as low as 1×107 Vm-1 but particularly striking changes in the moduli appear when the field exceeds 5×107 Vm-1. The storage modulus in some samples falls to low and even negative values, indicative of negative stiffness and likely instabilities in the polymer.
Keywords :
elastic constants; polymer films; polymer structure; shear modulus; viscoelasticity; amorphous phase; field-induced conformational changes; negative stiffness; polyethylene films; polymer instability; quartz crystal sensor technique; storage modulus; viscoelastic shear moduli; Amorphous materials; Compressive stress; Elasticity; Electric breakdown; Electrodes; Morphology; Plastic films; Polyethylene; Polymers; Viscosity;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350346
