Acceleration factors for oxidative aging of polymeric materials by oxygen detection.

Conference · Sat Jan 01 00:00:00 EST 2005

OSTI ID:986605

Assink, Roger Alan; Celina, Mathias C.; Skutnik, Julie Michelle

Three methods that were used to measure the chemical changes associated with oxidative degradation of polymeric materials are presented. The first method is based on the nuclear activation of {sup 18}O in an elastomer that was thermally aged in an {sup 18}O{sub 2} atmosphere. Second, the alcohol groups in a thermally aged elastomer were derivatized with trifluoroacetic anhydride and their concentration measured via {sup 19}F NMR spectroscopy. Finally, a respirometer was used to directly measure the oxidative rates of a polyurethane foam as a function of aging temperature. The measurement of the oxidation rates enabled acceleration factors for oxidative degradation of these materials to be calculated.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 986605
• Report Number(s): SAND2005-0316C; TRN: US201017%%419
• Resource Relation: Conference: Proposed for presentation at the DP Foam Conference held January 25-26, 2005 in Livermore, CA.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACCELERATION
AGING
ALCOHOLS
ANHYDRIDES
DETECTION
ELASTOMERS
OXIDATION
OXYGEN
POLYURETHANES
SPECTROSCOPY