Cotton cellulose and

Recently, Jessup and Prosen [89] have examined the heat of combustion of cotton cellulose and wood pulp cellulose, and of their nitrates. The data for di-and trinitrate are higher than those of Taylor and Hall, and approximate to the... 

Graft polymers of cotton cellulose and acrylonitrile initiated by radiation. Text. Res. J. 31, 988 (1961). 

O Connor, R. T., Instrumental Analysis of Cotton Cellulose and Modified... 

Instrumental Analysis of Cotton Cellulose and Modeled Cotton Cellulose O Connors, J., Ed. Marcel Dekko- New York, W2. 

Golova and Krylova pyrolyzed cotton cellulose and measured the decrease in the D-glucose residues, instead of the weight-loss, as a function of time, and found that the reaction follows a zero order. In contrast, Tang and Neill, on the basis of thermogravimetric data to be discussed later (see p. 446), suggested that the initial state of pyrolysis of cellulose is controlled by pseudo-zero-order kinetics and the final state is of pseudo-first order. 

O Conner R T, in Instrumental Analysis of Cotton Cellulose and Modified Cotton Cellulose, O Conner R T (Ed), New York, Marcel Dekker, 1972, 8-16. 

Chain length and molecular mass distribution have of course also strong implications for the performance of modified cellulose. For ethers, the degree of polymerization, DP, is usually between 50 and 2000 (300 for esters), as compared with 100 to 3000 for cotton cellulose and 600 to 1000 for wood cellulose. The relatively high polydispersity of the molecular mass originates from the starting material. 

G. F. Davidson and T. P. Nevell, Acidic properties of cotton cellulose and derived oxy-cellu-loses. V. Comparison of various methods proposed for determination of carboxyl content, J. Text. Inst., 39 (1948) T102-T117. 

The existence of an ordered structure in cellulose is shown conclusively by wide-angle x-ray diffraction (WAXD) and electron diffraction studies (3). The diffraction patterns exhibit reasonably well-definid reflections for which unit cells have been defined. There are four basic recognized crystalline modifications, namely, cellulose I, II, III and IV. By the WAXD method as proposed by Hermans (4,5) it has been found that native celluloses of different biological origin vary in crystallinity over wide limits, from A0% in bacterial cellulose to 60 in cotton cellulose and 70 in Valonia cellulose. 

Eleven cotton celluloses and one of Valonia were studied. Among the twelve samples, the first nine cotton samples are in a randomly oriented fibril state (cotton sliver), EHC I and Hydrocellulose II are powders, and Valonia is in membrane pieces. They are listed and described below. 

A comment on a model for the degradation of cotton cellulose corrects errors in a previous paper (R. J. Elcma, J. Polymer Sci., Part C, Polymer Symposia, 1973, 42, 1545). The availability of hydroxy-groups in completely mercerized cotton cellulose and in hydrocelluloses has been assessed by reaction with AA-diethylaziridinium chloride. ... 

---