PHYSICAL AND RHEOLOGICAL PROPERTIES OF NITROSO RUBBERS
Technical Report,25 Dec 1964,24 Mar 1965
MONSANTO RESEARCH CORP DAYTON OH DAYTON
Pagination or Media Count:
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 gcc. 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 CF3NOC2F4C2F3H terpolymers were examined.
- Polymer Chemistry