Synthesis hydroxyethyl cellulose

The derivatives are hydroxyethyl and hydroxypropyl cellulose. AH four derivatives find numerous appHcations and there are other reactants that can be added to ceUulose, including the mixed addition of reactants lea ding to adducts of commercial significance. In the commercial production of mixed ethers there are economic factors to consider that include the efficiency of adduct additions (ca 40%), waste product disposal, and the method of product recovery and drying on a commercial scale. The products produced by equation 2 require heat and produce NaCl, a corrosive by-product, with each mole of adduct added. These products are produced by a paste process and require corrosion-resistant production units. The oxirane additions (eq. 3) are exothermic, and with the explosive nature of the oxiranes, require a dispersion diluent in their synthesis (see Cellulose ethers). 

The enzymatic polymerization of lactones could be initiated at the hydroxy group of the polymer, which expanded to enzymatic synthesis of graft copolymers. The polymerization of c-CL using thermophilic lipase as catalyst in the presence of hydroxyethyl cellulose (HEC) film produced HEC-gra/f-poly( -CL) with degree of substitution from 0.10 to 0.32 [102]. 

THE SYNTHESIS OF HYDROPHOBE-MODIFIED HYDROXYETHYL CELLULOSE POLYMERS USING PHASE TRANSFER CATALYSIS... 

The two associative thickeners examined in the remainder of this text whose synthesis has not been discussed are hydrophobe-modified alkali-swellable emulsions (HASE) discussed in Chapters 25, 27, and 28, and hydrophobe-modified (hydroxyethyl)cellulose (HMHEC, discussed in Chapters 17, 18, and 27). HASE thickeners, by far the lowest cost hydrophobe-modified thickeners produced, should have achieved the largest market share on the basis of cost of production, but this situation does not appear to be the case (discussed in Chapter 28) in large part because of the poor properties observed with the lowest cost latex, vinyl acetate, used to form the continuous film. The applied-film properties 46) of vinyl acetate can be substantially improved through the use of HEUR polymers. HMHEC, synthesized by a matured (30-year-old) commercial slurry process (47) has achieved commercial acceptance, in large part because of linear high shear rate viscosities achieved in blends with HEUR thickeners (Chapter 27). 

Synthesis and Solution Properties of Hydrophobically Modified (Hydroxyethyl)cellulose... 

The Synthesis of Hydrophobe-Modified Hydroxyethyl Cellulose Polymers Using Phase... 

Chain extension reactions based on tbe activation of the cellulose surface aimed at provoking the grafting-from through the ring opening polymerization of heterocyclic monomers have been practiced industrially in the specific instance of the synthesis of hydroxypropyl and hydroxyethyl cellulose. The aim of these processes is, however, to... 

Gorga RE, Cohen RE (2004) Toughness enhancements in poly (methyl methacrylate) by addition of oriented multiwall carbon nanotube. J Polym Sci B Polym Phys 42(14) 2690-2702 Gorgieva S, Kokol V (2011) Synthesis and application of new temperature responsive hydrogels based on carboxymethyl and hydroxyethyl cellulose derivatives for the functional finishing of cotton knitwear. Carbohydr Polym 85 664-673... 

In the following, we wish to report the synthesis, characterization and properties of several copolymers of acrylamide (1) and perfluorocarbon comonomers (2-5), and of perfluorocarbon derivatives of hydroxyethyl cellulose. The laurylacrylate (6)-acrylamide copolymer was also synthesized for comparison purposes. 

Uses Solvent for cellulose acetate, ethylcellulose manufacturing insecticides, ethylene oxide, and ethylene glycol treating sweet potatoes before planting organic synthesis (introduction of the hydroxyethyl group). 

Use Solvent for cellulose acetate, ethylcellulose introduction of hydroxyethyl group in organic synthesis to activate sprouting of dormant potatoes manufacture of ethylene oxide and ethylene glycol insecticides. 

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