Cellulose w-

Ethanemercarbide (called Dianhydro-hexakis-[hydroxymercurij-athan, or Athanmercarbid, in Ger), H0.Hg.(0Hg2)C.C(Hg20).Hg0H mw 1293.69, OB to CO2 -8.735, yel powd, detonates at 2"30°C (183° C). It may be prepd by heating EtOH, PrOH, allyl-OH, amyl-OH, AcH, cane sugar, starch, or cellulose w yel HgO in alk soln insensitive to impact, but crackles under friction. It dehydrates at 200—230°C prior to violent detn at 230°C not decompd by strong acid or alkali (Ref 2b)... 

Fig. 9-3. Transition of cellulose I (/r = 0) to cellulose II (/r = 1) during cold alkali treatment of wood cellulose (W), cotton cellulose (C), bacterial cellulose (B), and animal cellulose (A) (RSnby, 1952).

With regjrd to cellulose two more collective volumes have appeared (1 ] whiclt are the continuation of the former ones edited by Ott. Spurlir. and (Jraffm. However, most of the text is no w dedicated to the biosynthesis of cellulose an J modifications of cellulose w hich arc outside the scope of the present book. Only one chapter written by Hiatt and Rebel 2l refers to esters of cellulose, including nitrocellulose and he informatior given by these authors is used in the present volume. 

Fig. 5.15 Tensile index of the new composite and reference samples. Commercial copy is a geometric mean value. Abbreviations-. C new composite handsheets. Fibre components euca eucalyptus unrefined, reg. cellulose regenerated cellulose, w fractionated refined softwood...

Yasnitskii, B.G., Dolberg, E.B. and Oridoroga, V.A. (1972) Mechanism of polyanhydroglucuronic acid formation during the interaction of cellulose w ith nitrogen oxides. Ukr. Khim. Zh., 38, 76-80. 

W. B. Russo and G. A. Serad, in A. L. Turbak, ed.. Solvent Spun Rayon, Modified Cellulose Fibers and Derivatives, ACS Symposium Series 58, American Chemical Society, Washington, D.C., 1977, p. 96. 

C. H. Ludwig and W. T. Zdybak, paper presented at the 185th National Meeting of the Mmerican Chemical Society, Cellulose, Paper and Textile Division, Seatde, Wash., Mar. 23, 1983. 

The Chemical Daily Company, Ltd., Tokyo, Japan, 1982, p. 95 K. Wheeler, W. Cox, and N. Takei, Cellulose Picetate and Cellulose Ester Plastics, CEH Marketing Research Report, SRI International, Menlo Park, Calif., Apr. 1989. 

HAYNES, w.. Cellulose—the Chemical that Grows, Doubleday, New York (1953)... 

Beaded acrylamide resins (28) are generally produced by w/o inverse-suspension polymerization. This involves the dispersion of an aqueous solution of the monomer and an initiator (e.g., ammonium peroxodisulfates) with a droplet stabilizer such as carboxymethylcellulose or cellulose acetate butyrate in an immiscible liquid (the oil phase), such as 1,2-dichloroethane, toluene, or a liquid paraffin. A polymerization catalyst, usually tetramethylethylenediamine, may also be added to the monomer mixture. The polymerization of beaded acrylamide resin is carried out at relatively low temperatures (20-50°C), and the polymerization is complete within a relatively short period (1-5 hr). The polymerization of most acrylamides proceeds at a substantially faster rate than that of styrene in o/w suspension polymerization. The problem with droplet coagulation during the synthesis of beaded polyacrylamide by w/o suspension polymerization is usually less critical than that with a styrene-based resin. 

Methyl Acetone. Commercial product .a water-white, anhydr liq, consisting of various mixts of acet (45 to 65%), methyl acetate (20 to 30%) and methanol (20 to 40%). Density about 0.83g/cc, boiling range 50 to 70°, flash p near 0°F. Miscible with hydrocarbons, oils and w. Obtained as a by-product in the manuf of acet and methanol from wood distn, representing fractions which cannot be economically sepd. The mixt can be used as such, being an excellent solv and plasticizer for NC and other cellulose esters, such as the acetate. It also dissolves rubber, gums, resins, lacquers, paint and varnish Refs 1) T.H, Durrans, Solvents , Van-Nostrand, NY (1938), 122 2) CondChemDict... 

Aaronson, Evaluate Method of Nitrating Cellulose Developed by the Stein Hall Co , PATR 1331 (1943) 3) W. Latimer J. Hildebrand,... 

Theory D. The presence of small quantities of sulfate, either as combined or free acid which is readily removed, does not greatly affect the stability of the NC. The real cause of instability is the presence in more intimate association with the NC, of other compds which cannot be removed by exhaustive washings. These compds which are acidic in character and exist in small quantities, are formed during the nitration of the cellulose. They can be removed only by prolonged boiling in either w or ale. The presence of acid or salt solns does not increase the ease of stabilization during boiling... 

---