PHYSICAL AND RHEOLOGICAL PROPERTIES OF NITROSO RUBBERS.
Quarterly rept. no. 5, 25 Jun-24 Sep 64,
MONSANTO RESEARCH CORP EVERETT MA
Pagination or Media Count:
Two nitroso gum samples were characterized as to molecular weight and similarity. Intrinsic viscosity measurements indicated molecular weights of from 1.38 to 1.57 x 10 to the 6th power. Insoluble content varied from 6 to 37 and fingerprinting by solution viscosity indicated that the two nitroso gums were different. Three solvents, FC-75, FC-43 and Freon 113, proved adequate for viscosity measurements. Light scattering measurements on an old 3M-produced gum indicated a weight average molecular weight of 400,000 as was predicted from viscosity measurements. Author