Detail of "3815-86-9"

Reference

Properties of poly(4-vinylpyridine-co-methyl vinyl ketone) membranes for reverse osmosis

Properties of poly(4-vinylpyridine-co-methyl vinyl ketone) membranes for reverse osmosis. Oikawa, Eizo; Igarashi, Yusuke (Fac. Eng., Niigata Univ., Igarashi 950-21, Japan). J. Appl. Polym. Sci., 29(5), 1723-34 (English) 1984. CODEN: JAPNAB. ISSN: 0021-8995. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Me vinyl ketone-4-vinylpyridine copolymer [90994-54-0] forms a dense, tough membrane, which is stronger than cellulose acetate when crosslinked with malonyl dihydrazide (I) [3815-86-9] or 2-phenyl-4,6-dihydrazino-s-triazine (II) [19992-23-5], and perform well in reverse osmosis with NaCl- and CoCl2-contg. feeds. The relationship between the I or II content and membrane performance was investigated. An increase in I or II to an increase in membrane thickness and water content as well as performance. Max. salt rejection was obtained at ~30 mol% I and ~13 mol% II based on Me vinyl ketone, and max. membrane strength was obsd. at 20-30 mol% crosslinking agent. A membrane with lower NaCl rejection tended selective permeability due to complexation of CoCl2 with the membrane. A 1:1 copolymer gave membranes of higher salt rejection, which may be related to monomer arrangement in the copolymer chain. Three methods for the flux improvement were presented and discussed: prepn. of a blend copolymer membrane contg. a hydrophilic monomer, crosslinking by quaternization with 1,4-diiodobutane [628-21-7], and oximation of the membrane material in order to introduce hydrophilic groups.

The effect of some hydrazine derivatives on the corrosion of aluminum in hydrochloric acid solution

The effect of some hydrazine derivatives on the corrosion of aluminum in hydrochloric acid solution. Moussa, M. N. H.; Taha, F. I. M.; Gouda, M. M. A.; Singab, G. M. (Fac. Sci., Mansoura Univ., Mansoura, Egypt). Corros. Sci., 16(6), 379-85 (English) 1976. CODEN: CRRSAA.In this experiment, several chemicals are used like 1068-57-1 and 613-94-5 DOCUMENT TYPE: Journal CA Section: 56 (Nonferrous Metals and Alloys) The inhibitive effect on the corrosion of Al in HCl of Girard's T [123-46-6], Girard's P [1126-58-5], oxalic acid hydrazide [996-98-5], malonic acid hydrazide [3815-86-9], succinic acid hydrazide [4146-43-4], and acetophenone G-T (PhCOMe-I condensation product) was studied by thermometric and wt. loss measurements. Adsorption of the hydrazides leads to the formation of a monolayer on the Al surfaces. .