Hardness of irradiated poly(methyl methacrylate) at elevated temperatures

Journal Article · Wed Aug 15 00:00:00 EDT 2001 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1388573· OSTI ID:40230504

Lu, K -P; Lee, Sanboh; Cheng, Cheu Pyeng

The decrease in hardness induced by gamma irradiation in poly(methyl methacrylate) (PMMA) has been investigated. The hardness is assumed to decrease linearly with the concentration of radiation-induced defects. Annealing at high temperatures induces defect annihilation as tracked by an increase in hardness. The annihilation follows first-order kinetics during isothermal annealing. The dependence of hardness on the reciprocal of the time constant satisfies the Arrhenius equation, and the corresponding activation energy of the kinetic process decreases with increasing dose. The hardness of postannealed PMMA decreases linearly with increasing dose. {copyright} 2001 American Institute of Physics.

• Sponsoring Organization: (US)
• OSTI ID: 40230504
• Journal Information: Journal of Applied Physics, Vol. 90, Issue 4; Other Information: DOI: 10.1063/1.1388573; Othernumber: JAPIAU000090000004001745000001; 029117JAP; PBD: 15 Aug 2001; ISSN 0021-8979
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTIVATION ENERGY
ANNEALING
ANNIHILATION
ARRHENIUS EQUATION
DEFECTS
HARDNESS
IRRADIATION
KINETICS
PHYSICS