PHYSICAL AND RHEOLOGICAL PROPERTIES OF NITROSO RUBBERS

Abstract

Several nitroso gums were partially characterized. Linear expansion coefficients of a typical nitroso gum were determined to be 0.000076 from -72C up to the glass transition with the glass transition at -49C. Density of the nitroso gum as received was 1.937 plus or minus 1 g/cc. A simple 'finger printing' technique utilizing Vicat softening temperatures was devised. A typical Vicat temperature was -40C. Volatile products representing up to 29 percent of the nitroso gum were collected. The products consisted of yet unidentified solvents and lower molecular weight portions. Atypicality (percent deviation from theoretical) was determined for the various gums. Atypicality varied from plus or minus 0.5% to plus or minus 4.0%. A change in typicality of the nitroso gum occurred with time and removal of the volatile product indicating loss of solvent and polymer constituent. Two CF3NO/C2F4/C2F3H terpolymers were examined.

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Document Details

Document Type
Technical Report
Publication Date
Mar 24, 1965
Accession Number
AD0628001

Entities

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  • G. Iii L. Ball
  • H. S. Wilson
  • I. O. Salyer
  • J. V. Pustinger

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  • Monsanto

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  • Biomedical And Dental Materials
  • Body Weight
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  • Thermal Expansion
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