Colloid and Polymer Science

, Volume 285, Issue 12, pp 1313–1319

Synthesis and electrical, rheological and thermal characterization of conductive polyurethane

Article

DOI: 10.1007/s00396-007-1688-7

Cite this article as:
Rwei, SP. & Wang, L. Colloid Polym Sci (2007) 285: 1313. doi:10.1007/s00396-007-1688-7

Abstract

This work studies the electrical, rheological, and thermal characteristics for polyurethane (PU) capped with tetraaniline as a new material, tetraaniline-containing poly(urethane–urea) (TAPU). The conductivities can be increased from less than 10−10 S/cm for pure PU to 10−4 S/cm for TAPU, independently of the length of the soft segment in the TAPU backbone chain. The tensile strength and modulus are increased when PU is copolymerized with tetraaniline. The viscoelastic creep can be effectively simulated using a Burgers model. Additionally, TAPU has higher viscosity, higher retardation time, and lower compliance J1 than regular PU. Restated, TAPU exhibits less elastic but superior permanent deformation than PU because tetraaniline functions as a chain holder. The thermogravimetric analytic (TGA) results reveal that TAPU has lower Td, smaller Tmw1 and Tmw2, and higher char yield because the dehydration of the urea-containing polymer produces a thin layer from a nitrogen compound on the polymer’s surface, which insulates the underlying polymer from heat and oxygen.

Keywords

Tetraaniline-containing poly (urethane–urea) (TAPU)ConductivityViscoelastic creepComplianceThermal degradation

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Institute of Organic and Polymeric MaterialsNational Taipei University of TechnologyTaipeiTaiwan
  2. 2.Center of Condensed Matter ScienceNational Taiwan UniversityTaipeiTaiwan