A Study of the Radiation Stability and Means of Fabricating MRC Copolymer 250B Films for Dosimeters.
Abstract
The two major objectives of this study were: to identify the factor or factors responsible for the unique radiation stability of MRC Copolymer 250B and to explore various methods for forming dosimeter quality films from polymer powder. Solution casting, blow extrusion, T-die extrusion, and biaxial orientation were studied. All evidence strongly indicates that the sulfate end group resulting from persulfate initiation is the structural feature responsible for radiation stability of MRC Copolymer 250B. There is evidence suggesting that some specific polar end groups are sufficient to impart radiation stability since hydrogen peroxide initiated polymer is also radiation stable. The possibility that a sulfur-containing emulsifier can contribute to radiation stability also exists. With the exception of the persulfate initiation, it was shown that no component of the polymerization recipe contributes to radiation stability. However, since it is necessary to use polymer made by the emulsion technique, the process is important. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1970
- Accession Number
- AD0715417
Entities
People
- Earl V. Kirkland
- George L. Ball Iii
- Ival O. Salyer
- Philip H. Wilken
- Roger L. Seelig
Organizations
- Monsanto