Cellulose ethylation

Ethyl Cellulose. Ethyl cellulose is prepared by reacting cellulose with caustic to form caustic cellulose, which is then reacted with chloroethane to form ethyl cellulose. Plastic-grade material contains 44 to 48% ethoxyl. 

This reaction was also applied to reduce the nitrile groups in the maeromolecules of cellulose ethyl cyanates and poly(vinyl alcohol)51. In this case it has been found that along with aldehyde groups a considerable amount of carboxylic groups is also formed. 

It has been shown52 that under similar conditions reduction of the nitrile groups in cellulose ethyl cyanate and of those in the copolymer of vinylidene cyanide with vinyl acetate, proceed simultaneously in two directions with the formation of aldehyde and amine groups. g+ g ... 

Grafting reactions carried out in the homogeneous medium for carboxymethyl cellulose, methyl cellulose, and hydroxyethyl cellulose, always achieved higher degree of grafting efficiency than those samples such as cellulose, ethyl cellulose and acetyl cellose, irradiated in the hetero-geneus medium. 

Methyl cellulose Ethyl cellulose Hydroxyethyl cellulose Hydroxypropyl cellulose Hydroxyethylmethyl cellulose Hydroxypropylmethyl cellulose Carboxymethyl cellulose sodium Cellulose acetate Cellulose acetate butyrate Cellulose acetate propionate Cellulose acetate phthalate Hydroxypropylmethyl cellulose phthalate... 

Other substituted celluloses were found to behave similarly to ethyl cellulose. An oxidation susceptibility order was established [23aj allyl cellulose > CMC > benzyl cellulose > ethyl cellulose > cyanoethyl cellulose. The cellulose ethers were found to be less resistant to oxidation than the esters. 

Compound Silica gel Cellulose + ethyl oleate Silanized silica + 4% DBS RP-18 + 4% HDBS pKa (25°C)... 

The classification of polymers previously described has been used in this book for the discussion of pyrolysis results. An important class of polymers that is not discussed here is that of chemically modified natural polymers (or semisynthetic polymers). Examples of such polymers are the modified celluloses (carboxymethyl cellulose, ethyl cellulose, etc ), modified starches, casein plastics (Galalith), etc. These types of compounds were discussed in the book on pyrolysis of natural organic polymers [2]. 

Ethyl Cellulose. Cellulose ethyl ether Ethocel. Prepd from wood pulp or chemical cotton by treatment with alkali and ethylation of the alkali cellulose with ethyl chloride. Review and bibliography E. Ott, Cellulose and Cellulose Derivatives (New York, 2nd ed., ]955). 

The PVC-acrylic polymer alloy previously described is characterized by high speed injection moldability and, in sheet form, by deep drawing capability, both of which are the result of low melt viscosity. A cellulose-ethyl acrylate graft copolymer compatibilizes cellulose and PEA, cellulose and PVC, as well as starch and PVC (8). These compositions containing PVC obviously have better flow properties than non-thermoplastic cellulose or starch. However, they also have better flow properties than PVC alone. 

Cellulose, carboxymelhyl ether Cellulose, ethyl ether Cellulose, methyl ether Cholest-4-en-3-oI, 4-methyl- (3ot) Cholest-5-en-3-ol (3 3)- cholesterol ... 

Cellulose, ethyl ether Cellulose, methyl ether... 

Precautions Harmless when used for intended purpose. Synonyms cas 9004-57-3 ethyl ether of cellulose Ethyl Cinnamate... 

Lacquers are clear, synthetic coatings, most often cellulose-based (such as nitrocellulose often modified with a resin, cellulose acetate, methyl cellulose, ethyl cellulose, and benzyl cellulose) that dry through evaporation of a solvent. Lacquers can be made from a liquid lacquer base, a starting point for speciality lacquers (e.g., automotive) which most often contain the film-forming material in concentrated solution with or without other components. The base may be up to 25% nitrocellulose. 

In contrast to methyl cellulose, ethyl cellulose is commonly prepared in its organic soluble state with a DS of 2.3-2.6. Films of ethyl cellulose are thermoplastic, and they resist alkali and salts. Because of their organic solubility, the films tend to swell very little in the presence of water. The resistance of ethyl cellulose to chemical degradation has led to its use in films, lacquers, and adhesives. In adhesives, ethyl cellulose may either be applied in a solvent or as a hot-melt. 

Poly(methyl acrylate-co-methyl methacrylate-co-methacrylic acid) 7 3 1 Poly(methacrylic acid-co-methyl methacrylate) 1 2 Hydroxypropyl cellulose Ethyl cellulose Cellulose acetate butyrate Cellulose acetate phthalate Poly(ethylene oxide)... 

Tsujiyama T, Suzuki N, Kawata M, Uchida T, Goto S. Preparation and pharmacokinetic and pharmacodynamic evaluation of hydroxy propyl cellulose-ethyl cellulose microcapsules containing piretanide. 

Celluloses ethyl cellulose, methylcellulose, nitrocellulose, carboxy methyl cellulose, hydroxyethylcellulose, cellulose acetate phthalate, cellulose acetate butyrate phthalate... 

Ethyl cellulose Ethyl chloride Ethyl ether Ethyl formate (4079)... 

Cellulose acetopropionate. See Cellulose acetate propionate Cellulose carboxymethyl ether Cellulose carboxymethyl ether sodium salt. See Carboxymethylcellulose sodium Cellulose crystalline. See Cellulose Cellulose, 2,5-diacetate. See Cellulose acetate Cellulose ethyl Cellulose ethylate Cellulose ethyl ether. See Ethylcellu-lose... 

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