Metal loaded poly-p-xylene
Inertial confinement fusion target designs frequently require hydrocarbon polymer coatings loaded with varying amounts of high atomic number materials, typically metals. In addition to the usual requirements on thickness uniformity and surface finish, the metal loading must be dispersed in the polymer matrix on a submicron scale. The common means of obtaining such coatings for laser fusion targets is by glow discharge polymerization of an appropriate organometallic monomer starting material. Particle beam fusion targets, on the other hand, have utilized polymer coatings obtained by the pyrolytic vapor deposition of p-xylene. With this process, one may obtain halogenated poly-p-xylene by synthesis of the required halogenated dimer. Alternatively, we are developing a technique to incorporate metals into poly-p-xylene, essentially by combining the reactive monomer vapor, downstream from the pyrolysis region, with metal vapor from a resistively-heated source in a vacuum chamber. In addition to allowing the possibility of codeposition with any material which can be deposited by thermal evaporation, the technique allows for graded composition/density within the coating. In principle, one can obtain films with metal loadings continuously variable from that of the poly-p-xylene matrix through solid metal density.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5200721
- Report Number(s):
- SAND-80-1955C; CONF-801037-3; TRN: 80-015173
- Resource Relation:
- Conference: American Vacuum Society conference, Detroit, MI, USA, 13 Oct 1980
- Country of Publication:
- United States
- Language:
- English
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