Accession Number : AD0715417

Title :   A Study of the Radiation Stability and Means of Fabricating MRC Copolymer 250B Films for Dosimeters.

Descriptive Note : Technical rept. 1 May 68-16 Nov 70,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OHIO DAYTON LAB

Personal Author(s) : Salyer,Ival O. ; Ball,George L. , III ; Wilken,Philip H. ; Kirkland,Earl V. ; Seelig,Roger L.

Report Date : NOV 1970

Pagination or Media Count : 67

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)

Descriptors :   (*STYRENE PLASTICS, *DAMAGE), (*DOSIMETERS, STYRENE PLASTICS), MANUFACTURING, CURING AGENTS, SULFATES, EXTRUSION, COLLOIDS, FILMS, ELECTRICAL CONDUCTIVITY, COPOLYMERIZATION, CHEMICAL ANALYSIS, (U)CHEMICAL ANALYSIS

Subject Categories : Polymer Chemistry
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE