Detail of "3729-34-8"

Reference

Poly(perfluoroether)oxadiazole elastomer system cured with terephthalonitrile oxide

Poly(perfluoroether)oxadiazole elastomer system cured with terephthalonitrile oxide. Cochoy, Robert E. (Air Force Mater. Lab., Wright-Patterson AFB, Ohio, USA). Polym. Prepr., Am. Chem. Soc., Div. Polym. Chem., 16(2), 18-23 (English) 1975. CODEN: ACPPAY. DOCUMENT TYPE: Journal CA Section: 38 (Elastomers, Including Natural Rubber) Readily vulcanizable nitrile group-contg. poly(perfluoroalkylene oxide)-based rubbers are prepd., vulcanization of these rubbers with terephthalonitrile dioxide (I) [3729-34-8], and the properties of the vulcanizate are discussed. Fluororubber gums contg. nitrile groups were prepd. by polymg. nitrile-terminated poly(perfluoroethylene oxide) perfluoropentamethylene glycol diether [63076-10-8] with I for 4 days at ambient temp. to form an oligomer, which was chain extended by polymn. with 1,3,5-tricyanobenzene [10365-94-3] for 3 days at ambient temp. The resulting gum was vulcanized at 200.degree.F for 20 min to give a rubber which, in a 3.degree.C/min thermogravimetric anal., showed no wt. loss up to 270.degree.C and 6% wt. loss at 300.degree.C.

Enthalpies of combustion of 1,4-dicyanobenzene di-N-oxide and 1,4-dicyanobenzene: the mean dissociation enthalpy of the nitrogen-oxygen bonds

Enthalpies of combustion of 1,4-dicyanobenzene di-N-oxide and 1,4-dicyanobenzene: the mean dissociation enthalpy of the nitrogen-oxygen bonds. Acree, W.Several substances are used for example 623-26-7 and 3729-34-8 which are their cas registry numbers. E., Jr.; Tucker, Sheryl A.; Pilcher, G. (Dep. Chem., Univ. North Texas, Denton, TX 76203-5068, USA). J. Chem. Thermodyn., 24(2), 213-16 (English) 1992. CODEN: JCTDAF. ISSN: 0021-9614. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The std. (p° = 0.1 MPa) molar enthalpies of combustion in oxygen at the temp. 298.15 K were measured by static-bomb calorimetry for 1,4-dicyanobenzene and its di-N-oxide. The std. molar enthalpies of sublimation of these compds. were derived from vapor pressures as functions of temp. detd. using Knudsen cells in a microcalorimeter. From the std. molar enthalpies of formation of the gaseous compds., the mean molar dissocn. enthalpy of the N-O bonds was derived, WD(N-O)V/(kJ×mol-1) = (223.1 ± 1.7). .