Ethylene compounds of the formula R.CH : CH.R<1>, where R and R<1> represent hydrogen or an alkyl group are oxidized by treatment with selenium dioxide or selenious acid. Temperatures below 350 DEG C. are employed in the process and compounds containing the grouping -- CO.CO -- are ...
ethylene，英语单词，主要用作名词，作名词时译为“乙烯”。单词用法 1.N a colourless flammable gaseous alkene with a sweet odour, obtained from petroleum and natural gas and used in the manufacture of polythene and many other chemicals. Formula: CH2:CH2 乙烯 (Also called ethene)短语搭配 E...
Formula of modified ethylene-propylene-diene monomer (EPDM) rubberdoi:CN102807712 AThe invention discloses a formula of modified ethylene-propylene-diene monomer (EPDM) rubber. The modified EPDM rubber comprises EPDM rubber and additives, wherein the additives comprise tricresyl phosphate serving as a...
Previously we have shown that 13C NMR was very sensitive to monomer sequence distribution in ethylene-propylene copolymers. A formula was derived, based on copolymerization theory, to calculate the reactivity ratio product directly from ... CJ Carman,RA Harrington,CE Wilkes - 《Rubber Chemistry & ...
SUBSTANCE: elastomeric ethylene/propylene copolymers are prepared in presence of catalytic system constituted by (i) vanadium-based catalyst as such or applied on inert carrier and (ii) alkylaluminum compound having general formula R<Sub>n</Sub>AlX<Sub>m</Sub>, in which R represents C1-C20-...
Random propylene/ethylene copolymers are provided characterized by Ethylene content in the range of 4.5-7% wt; Mw/Mn (via GPC) in the range 3.5-5.5; Mz/Mw (via GPC) lower than 4; absence of 2-1 regioinversion, and Melting Temperature (Tm) (non-nucleated grade) lower than 143° C....
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The copolymers are composed preferably of 70% to 99.9% and more preferably of 80% to 99% by weight of one kind of olefin. Preference is additionally given to copolymers of propylene with 0.1% to 30%, preferably 1% to 20%, by weight of ethylene.In one preferred embodiment of the ...
A composition suitable for use as dyeing or textile auxiliary and which comprises a mixture of acid esters of adducts of ethylene oxide and propylene oxide with fatty alcohols having not less than 6 carbon atoms, at least one component of which composition is an acid ester of the formula ##...
1. Names and Identifiers1.1 Name Propylene oxide, ethylene oxide, adipic acid, 4,4-methylenebis(cyclohexylisocyanate), 4,4-methylenebis(cyclohexylamine), isophorone diamine polymer 1.2 Synonyms Cyclohexanamine, 4,4′-methylenebis-, polymer with 5-amino-1,3,3-trimethylcyclohexanemethanamine, hexanedioic ...