Redox-labelled poly(ethylene glycol) used as a diffusion probe in poly(ethylene glycol) melts

Conference · Thu Nov 30 23:00:00 EST 1995

OSTI ID:126848

Haas, O ^[1]; Velasquez, C; Porat, Z ^[2]

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1. Paul Scherrer Institute, Villigen (Switzerland)
2. Univ. of North Carolina, Chapel Hill, NC (United States); and others

Ferrocene labelled monomethyl poly(ethylene glycol) MPEG with molecular weights of 1900 and 750 was prepared and used as an electrochemical diffusion probe in poly(ethylene glycol) melts. Cyclic voltammetry and chronoamperometry were used in connection with microdisk electrodes to measure the diffusion coefficient of redox tagged molecules using melted poly(ethylene glycol) as a solvent. The molecular weight of the solvent polymer was 750, 2000 and 20000. Results from the temperature dependency of the diffusion process and of the viscosity and conductivity of the polymer electrolyte are presented and discussed.

• OSTI ID: 126848
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRODES
FERROCENE
MOLECULAR WEIGHT
POLYETHYLENE GLYCOLS
TEMPERATURE DEPENDENCE
VISCOSITY