Temperature effects on the rate of photodegradation for polymers containing metal-metal bonds along their backbone

POLY 39

Bevin C. Daglen, bjones6@darkwing.uoregon.edu, Department of Chemistry, University of Oregon, Eugene, OR 97403 and David R. Tyler, Materials Science Institute, University of Oregon, 1252 Univ of Oregon, Eugene, OR 97403-1252.
The syntheses and photodegradation of poly(vinyl chloride) that contain metal-metal bonds in their backbone will be described. When exposed to visible light in the presence of a radical-trapping agent a photochemical reaction occurs that results in net degradation of the polymer. These polymers have been shown to photodegrade oxidatively or by chlorine atom abstraction. The rate of the photoreaction in the solid-state has been shown to be temperature dependent. The quantum yield of the reaction increases with increasing temperature. A comparison of the solid-state quantum yield values for the photoreaction as a function of temperature will be discussed. The results will consider how various factors, including Arrhenius behavior and polymer morphology, play a role in the temperature dependent solid-state photodegradation of polymers.
 

General Papers: Synthesis and Characterization
8:00 AM-11:40 AM, Sunday, 10 September 2006 San Francisco Marriott -- Nob Hill A, Oral

Division of Polymer Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006