Accession Number : ADA269247

Title :   Physical Aging and Dye Diffusion in Polysulfone Below the Glass Transition Temperature.

Descriptive Note : Technical rept.,

Corporate Author : NEBRASKA UNIV LINCOLN DEPT OF CHEMISTRY

Personal Author(s) : Zhang, X. Q. ; Wang, C. W.

Report Date : 1993

Pagination or Media Count : 14

Abstract : The effect of physical aging on the tracer diffusion coefficient D of camphorquinone in polysulfone is investigated. It is shown that if the sample is sufficiently annealed and physical aging is nearly complete, the temperature dependence of D will reflect the primary alpha-relaxation process of the host polymer. In the temperature range between T (= 185 deg C) and 165 deg C, D is found to be a function of time, and the time dependence of D is given by D = At(-)micron, with micron approximately equal to unity.

Descriptors :   *DIFFUSION COEFFICIENT, *POLYSULFONES, *AGING(MATERIALS), *PHYSICAL PROPERTIES, *DYES, *GLASS, *TRANSITION TEMPERATURE, FUNCTIONS, POLYMERS, RELAXATION, TEMPERATURE, TIME DEPENDENCE, ANNEALING, QUINONES, COMPOSITE MATERIALS.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Laminates and Composite Materials
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE