cellulose ester


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Noun1.cellulose ester - any ester of cellulose with an acid
cellulose - a polysaccharide that is the chief constituent of all plant tissues and fibers
cellulose nitrate, guncotton, nitrocellulose, nitrocotton - a nitric acid ester; used in lacquers and explosives
ester - formed by reaction between an acid and an alcohol with elimination of water
cellulose acetate - an ester of acetic acid; used in fibers and fabrics; photographic films and varnishes
cellulose xanthate, viscose - a cellulose ester obtained by treating cellulose with caustic soda
References in periodicals archive ?
Cellulose acetate propionate (CAP) is a vital thermoplastic cellulose ester. Growing demand for CAP has resulted in the increased market for Propionic acid.
Cellulose acetate is the most studied and most widely used cellulose ester derivative.
Debenham et al., "Advances in cellulose ester performance and application," Progress in Polymer Science, vol.
However, the dark brown color of the liquefied residue remained unchanged after alkali treatment, suggesting that lignin fragments or carboxyl compounds introduced in the liquefaction process still existed, which formed a bridging bond with cellulose ester that prevents the separation of cellulose into individual fiber.
Likewise, organic chemicals are further divided into carbohydrates including sugar (actual sugar, sugar alcohol, artificial sweetener), starch (modified, converted, dried) and cellulose (cellulose ether, cellulose ester, croscarmellose sodium, microcrystalline cellulose), petrochemicals including glycol (polyethylene, propylene glycol), povidone, mineral hydrocarbons (petrolatum, mineral waxes, mineral oils), acrylic polymers, others (antimicrobials, antioxidants, dyes & lakes), oleochemicals including fatty alcohol, mineral stearate, glycerin and others (alcohol, citric acid, lactic acid, polysaccharide gums, Shellac), proteins including gelatin and others including water for injection and purified water.
According to the USP (2005), a polymer is the product of the partial reaction of phthalic anhydride and cellulose ester acetate with 21.5-26% of acetyl groups ([C.sub.2][H.sub.3]O) and 30-36% of phthalic ones ([C.sub.8][H.sub.5][O.sub.3]).
The mixed Cellulose Ester membrane efficiently binds trace proteins making them the syringe filters of choice for filtration of aqueous solutions.
As well as the Bio-Flex co-polyester/PLA, FKuR makes Biograde cellulose ester compounds and Fibrolon wood/plastic compounds based on PLA, and PP.
Furthermore, the sampling methods have some deficiencies, mainly the absorption of moisture from the air by the cellulose ester membranes, and the adhesion of dust on the walls of the cassettes and sampling tubes.
The easy-to-use chart for microporous filter materials features a performance characteristics table highlighting pertinent performance criteria for the company's broad range of mixed cellulose ester (MCE), polyvinylidene fluoride (PVDF), polyether sulfone (PES), polytetrafluoroethylene (PTFE) and ultrahigh molecular weight polyethylene (UPE) membranes.
Five types of filter were tested: cellulose acetate (CA, pore size of 0.22 [micro]m--Nalgene, Rochester, NY), mixed cellulose ester (MCE, 0.22 [micro]m--Fisher), nylon (N, 0.45 [micro]m--Corning, Corning, NY), polyestersulfone (PES, 0.22 [micro]m--Millipore, Billerica, MA), and polytetrafluoroethylene (PTFE, 0.22 [micro]m--Fisherbrand).