Monitoring detachment and diffusion of metallic species in polycarbonate

Journal Article · Wed Jul 03 00:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4813455· OSTI ID:22121593

Bencomo, M. ^[1]; Castro-Colin, M. ^[2]; Lopez, J. A.; Ramirez-Homs, E. ^[3]

---

1. Department of Physics, Texas A and M U. College Station, TX 77843 (United States)
2. Bruker AXS GmbH, 76187, Karlsruhe (Germany)
3. Department of Physics, U. of Texas at El Paso, El Paso, TX 79968 (United States)

Photon absorption is known to create peroxy radicals in polymers, in a process that entails the removal of hydrogen atoms and the subsequent breakage of bonds. Bond-breaking is found to free, from the polymeric matrix, metallic additives which are then able to diffuse out, as evidenced by the change in both the metallic fluorescence yield and the XPS profiles of C, N, and O. Polycarbonate was artificially weathered using UV radiation from mercury emission lines at 365, 405 and 435 nm, followed by thermal treatment. The UV wavelengths used have energies comparable to those of covalent bonds found in polymeric chains. Both processes, light exposure and thermal, have the purpose of stimulating the degradation of polycarbonate.

• OSTI ID: 22121593
• Journal Information: AIP Conference Proceedings, Vol. 1544, Issue 1; Conference: 9. international symposium on radiation physics, Puebla (Mexico), 14-17 Apr 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ADDITIVES
CHEMICAL BONDS
DIFFUSION
FLUORESCENCE
HEAT TREATMENTS
HYDROGEN
MATRIX MATERIALS
MERCURY
PEROXY RADICALS
PHOTONS
POLYCARBONATES
RADIATION EFFECTS
ULTRAVIOLET RADIATION
VISIBLE RADIATION
WEATHERING
X-RAY PHOTOELECTRON SPECTROSCOPY