Ion beam damage of polymer surfaces: Insights from molecular-dynamics simulation
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering
Molecular-dynamics simulations are used to model the bombardment of crystalline polyethylene by carbon and rare-gas atoms with kinetic energies between 20 eV and 80 eV. The simulations predict substantial near-surface damage, including radical formation via loss of hydrogen from the chains, insertion of carbon into the polymer backbone, and chain crosslinking. For the rare gas atoms, the observed chemical dynamics are dependent on the mass of bombarding species, with the ratio of broken carbon-hydrogen to carbon-carbon bonds decreasing with increasing mass. The total number of bonds broken, however, is a linear function of kinetic energy with the lighter species having a higher slope and lower threshold energy for inducing damage.
- OSTI ID:
- 549798
- Report Number(s):
- CONF-961202-; ISBN 1-55899-342-8; TRN: 98:000441
- Resource Relation:
- Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of Materials modification and synthesis by ion beam processing; Alexander, D.E. [ed.] [Argonne National Lab., IL (United States)]; Cheung, N.W. [ed.] [Univ. of California, Berkeley, CA (United States)]; Park, B. [ed.] [Georgia Inst. of Tech., Atlanta, GA (United States)]; Skorupa, W. [ed.] [Research Center Rossendorf, Inc., Dresden (Germany)]; PB: 748 p.; Materials Research Society symposium proceedings, Volume 438
- Country of Publication:
- United States
- Language:
- English
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