Photodegradation studies of silver-backed polyacrylonitrile (PAN) films
Fourier transform infrared (FT-IR) reflection-absorbance (RA) measurements have been used to characterize Ag-backed polyacrylonitrile (PAN) films and to study their photodegradation. The optical constants n and k for the polymers are determined in the mid-IR region, and the dependence of RA values on polymer functionality concentration as a function of film thickness calculated. The IR-RA values are nearly linear with the concentration of functionalities for PAN films of thicknesses up to 0.1 ..mu..m. Some oxidative photodegradation pathways have been proposed; with radiation of lambda greater than or equal to 250 nm, a polyimine structure is generated. A combination of 1.0% wt of Irganox 1010 and 0.5% wt of Irgastab 2002 in PAN films was found to significantly retard the photodegradation of the polymer without affecting the specularity of the PAN/Ag surface.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA); Denver Univ., CO (USA). Dept. of Chemistry
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 5512546
- Report Number(s):
- SERI/TP-255-2751; CONF-850887-11; ON: DE85012154
- Resource Relation:
- Conference: SPIE international technical symposium on optical and electro-optical engineers, San Diego, CA, USA, 18 Aug 1985; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
FILMS
DECOMPOSITION
POLYACRYLATES
SOLAR REFLECTORS
ABSORPTIVITY
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
INFRARED RADIATION
OPTICAL PROPERTIES
POLYMERS
SILVER
SOLAR SIMULATORS
SPECTRAL REFLECTANCE
SUBSTRATES
ULTRAVIOLET RADIATION
ANALOG SYSTEMS
CHEMICAL REACTIONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
ESTERS
FUNCTIONAL MODELS
INFORMATION
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYVINYLS
RADIATIONS
SIMULATORS
SOLAR CONCENTRATORS
SOLAR EQUIPMENT
SPECTROMETERS
TRANSITION ELEMENTS
141000* - Solar Collectors & Concentrators
360603 - Materials- Properties