Accelerated aging of cellulose by laser irradiation. [Development for Shroud of Turin]

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5101516

Jackson, J P; Arthurs, E; Schwalbe, L A; Sega, R M; Windish, D; Long, W H; Stappaerts, E A

We describe a new technique for studying thermally-induced chemical transformations in cellulose developed for the Shroud of Turin. The apparatus consists of a carbon dioxide laser for heating, an infrared thermometer, and an optical reflectance spectrometer for tracking the progressive discoloration of the sample. To illustrate the technique, we present measurements from a single piece of sample linen along five isotherms in the range 200-290/degree/C. The results are explained in terms of first-order chemical rate theory and a four-step model. From the measurements we derive the activation energies, Arrhenius constants, and reflectivities of the chromophoric states. 4 refs., 2 figs., 1 tab.

• Research Organization: Kaman Sciences Corp., Colorado Springs, CO (USA); Oriel Corp., Stratford, CT (USA); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Air Force Academy, CO (USA). Frank J. Seiler Research Lab.; Northrop Research and Technology Center, Palos Verdes Peninsula, CA (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5101516
• Report Number(s): LA-UR-88-1185; CONF-880408-17; ON: DE88009142
• Resource Relation: Conference: Spring meeting of the Materials Research Society, Reno, NV, USA, 4 Apr 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CELLULOSE
AGING
DECOMPOSITION
ACTIVATION ENERGY
ARCHAEOLOGICAL SPECIMENS
ARRHENIUS EQUATION
CLOTHING
COLOR
CULTURAL OBJECTS
HIGH TEMPERATURE
LASER-RADIATION HEATING
OPTICAL PROPERTIES
PYROLYSIS
REFLECTIVITY
CARBOHYDRATES
CHEMICAL REACTIONS
ENERGY
EQUATIONS
HEATING
ORGANIC COMPOUNDS
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
PLASMA HEATING
POLYSACCHARIDES
SACCHARIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
360604* - Materials- Corrosion
Erosion
& Degradation