Detail of "93-99-2"

Reference

Use of a spectrophotometric method for studying some physicochemical properties of polymer materials and their ingredients

Use of a spectrophotometric method for studying some physicochemical properties of polymer materials and their ingredients. Livanova, N. M.; Ershov, Yu. A.; Miller, V. B.; Petukhov, S. M. (USSR). Zh. Fiz. Khim., 51(2), 402-5 (Russian) 1977. CODEN: ZFKHA9. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 65, 69 A convenient method utilizing absorption spectroscopy in the UV and visible regions was developed for investigation of sorption and diffusion of low-mol.-wt. compds. in polymers and for detn. of heats of sublimation and evapn. The method was used for detn. of partial vapor pressures and heats of evapn. (.DELTA.H) of 7 antioxidants (BzOPh [93-99-2], Ph2NH [122-39-4], etc.), and for heats of desorption of BzOPh and Ph2NH from isotactic polypropylene [25085-53-4]. The latter values were lower than the .DELTA.H of the corresponding pure compds. and they did not change with concn.

Solubility and diffusion of low-molecular-weight compounds in oriented polyolefins

Solubility and diffusion of low-molecular-weight compounds in oriented polyolefins. Shibryaeva, L. S.; Kiryushkin, S. G.; Mar'in, A. P. (Inst. Khim. Fiz., Moscow, USSR). Vysokomol. Soedin., Ser. B, 29(2), 113-16 (Russian) 1987. CODEN: VYSBAI. ISSN: 0507-5483. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) Elongational orientation of polypropylene (I) [9003-07-0] and poly(4-methyl-1-pentene) (II) [25068-26-2] and draw ratio 9 resulted in a decrease of the diffusion coeff. of O and Ph benzoate (III) [93-99-2] by a factor of ~3, whereas the soly. of O and III decreased to a lesser extent (~1.2-1.6 times). For O, the heat of soln. in I increased on orientation, but its change in II was negligible. At 20-70°, the diffusion coeffs. of O increased with increasing temp. in both isotropic and oriented I and II, but no change in activation energy of diffusion was obsd. The soly. of O in oriented and isotropic I estd. at 130° was 5.8 ′ 10-7 and 2.4 ′ 10-6 mol/kg-GPa, resp. The soly. of O in oriented and isotropic II at 130° was 1.8 ′ 10-6 and 2.In this experiment, several chemicals are used like 25068-26-2 and 7782-44-7 0 ′ 10-6 mol/kg-GPa, resp., i.e., virtually orientation independent. .