Reference

Elongation of plasticized poly(vinyl chloride)

Elongation of plasticized poly(vinyl chloride). Kandpal, L. D.; Saxena, A. K.; Viswanath, B.; Balakrishna, K. J. (Def. Mater. Stores Res. Dev. Establ., Kanpur, India). Indian J. Technol., 15(2), 63-6 (English) 1977. CODEN: IJOTA8. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) The effects of various plasticizers and stabilizers on the time and temp.-dipendence of elongation of PVC [9002-86-2] are examd. and a stepwise mechanism of relaxation is related to a dipole-dipole polymer additive interaction. A linear relation is obsd. between the glass transition temp. (Tg) of PVC and the content of dioctyl phthalate [117-84-0] or benzyl Bu phthalate [85-68-7]. PVC contg. p-toluenesulfonamide [70-55-3] as secondary plasticizer had a sharp break in the plasticizer content-Tg curve at 15 phr. The same behavior was obsd. for PVC contg. 3,4-xylenol and PhOH novolaks as plasticers.

Quantitation of o- and p-sulfamoylbenzoic acids in commercial saccharin by high speed liquid chromatography

Quantitation of o- and p-sulfamoylbenzoic acids in commercial saccharin by high speed liquid chromatography. Nelson, James J. (Food Drug Adm., Publ. Health Serv., New York, N. Y., USA). EDRO SARAP Res. Tech. Rep., 1, Paper 45-74, 25 pp. (English) 1976. CODEN: ESRRD5. DOCUMENT TYPE: Journal CA Section: 17 (Foods) A 6 g saccharin [81-07-2] sample was dissolved in 30 mL MeOH, 1.6 mL HNO3 was added, and the mixt. was chilled and centrifuged. The ppt. was shaken with 10 mL MeOH and centrifuged. The supernatant was dried under N, mixed with 0.2 mL MeOH, and again dried. An internal std. (p-hydroxybenzoate) was added and the material was subjected to high speed liq. chromatog. on a Dupont SAX column with 0.008M NaNO3 in 0.01M Na tetraborate buffer as the mobile phase. O-sulfamoylbenzoic acid [632-24-6] and p-sulfamoylbenzoic acid [138-41-0] were quantitated with a UV detector and were detd. accurately at the 80 and 25 ppm levels, resp. O-toluenesulfonamide [88-19-7], p-toluenesulfonamide [70-55-3], 1,2-benzisothiazoline-1,1-dioxide [936-16-3], and 3-amino-1,2-benzisothiazole S-dioxide [7668-28-2] were extd. from saccharin with Me2CO and detd. with an ODS column with isooctane as the mobile phase.