Preparation of microcellular foam in cylindrical gold targets
- Polymers and Coatings Group, MST-7, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The preparation of microcellular foam in submillimeter cylindrical gold targets is described. The gold cylinders were fabricated by electroplating gold onto a silicon bronze mandrel and leaching the mandrel with concentrated nitric acid. After several rinsing and cleaning steps, the cylinders were filled with a solution containing trimethylolpropanetriacrylate (TMPTA). Low density, microcellular polymeric foam was prepared by [ital in] [ital situ] photopolymerization of the TMPTA solution. Foam preparation was extremely sensitive to metal ion contaminants. In particular, copper ions left behind from ineffective leaching of the silicon bronze mandrels inhibit polymerization and must be removed in order to obtain uniform, nonshrinking foams. A procedure for the effective leaching of the mandrels is described. In addition, a study on the effects of potential contaminants and polymerization inhibitors on TMPTA photopolymerization is presented.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6043762
- Journal Information:
- Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States), Vol. 11:4; ISSN 0734-2101
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FOAMS
SYNTHESIS
LASER TARGETS
2-METHYLPROPANE
ACRYLATES
GOLD
IMPURITIES
POLYMERIZATION
ULTRAVIOLET RADIATION
ALKANES
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROCARBONS
METALS
ORGANIC COMPOUNDS
RADIATIONS
TARGETS
TRANSITION ELEMENTS
400500* - Photochemistry