Cellulosics ethyl cellulose

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... 

Synonyms Cellulose ethyl Cellulose ethylate Cellulose ethyl ether EC Ethocel... 

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. 

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. 

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]. 

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... 

Cellulosic membranes are developed as a novel dmg delivery system, which is expressed to use on the skin and used as a mucus membrane of stomach, ear, nose, eye, rectum, and vagina. The goal excipients of these preparations are adhesive and film-former polymers. Modified cellulose, especially cellulose ethers, are extensively applied in bio-adhesives such as nasal, vaginal, ocular, buccal, and transdermal inventions only or by blend with additional polymers. Further newly applied ethers of cellulose in bio-adhesives contain anionic ether derivatives such as sodium carboxy-methyl cellulose (NaCMC) and non-ionic cellulose ethers such as hydoxypropyl cellulose (HPC), carboxymethyl cellulose (CMC), hydroxyethyl cellulose, ethyl cellulose (EC), hydroxylpropylmethyl cellulose (HPMC), or methyl cellulose (MC). Capability of polymer to absorb water from mucus and pH of objective area are main features defining the adhesive power of polymers. One benefit of cellulose ethers, such as HPC and NaCMC, is smaller dependence of adhesion period and their adhesion strength to pH of medium than thiolated bio-adhesive polymers and polyacrylate... 

Cellulose acetate—Butyrate Nitrocellulose Methyl cellulose Ethyl cellulose Hydroxyethyl cellulose Hydroxypropyl methyl cellulose... 

Draw the structure of the repeating unit in ethyl cellulose and hydroxyethyl cellulose. Ethyl cellulose is not soluble in aqueous solvents but hydroxyethyl cellulose is. Suggest an explanation for the difference in solubility of these two binders. 

Cellulose, an almost linear polymer of hydroglucose, is the most abimdantly occurring natural polymer on earth. Films made from cellulose derivatives tend to be water soluble, resistant to fats and oils, tough, and flexible (Baldwin, Nisperos, Hagenmaier, Baker, 1997 Cutter, Sumner, 2002 Krumel, Lindsay, 1976). A number of cellulose derivatives are produced commercially, most commonly carboxy-methyl cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and cellulose acetate (CA). Of these derivatives, only CA is widely used in packaging of baked goods and fresh produce. Cellulosic derivatives such as hydroxy propyl... 

Methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, caiboxymethyl cellulose, ethylhydroxyethyl cellulose, methylhydroxypropyl cellulose... 

Rayon, cellophane Cellulose acetate Cellulose nitrate Hydroxy ethyl cellulose Carboxy methyl cellulose Ethyl cellulose Methyl cellulose Polyvinyl alcohol Polyvinyl butyral Polyvinyl formal Brominated butyl rubber Polyvinyl cinnamate Cellulose nitrate (guncotton) Chlorinated rubber Graft copolymer... 

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