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Cellulose chain length

Several solvents have been studied as a medium for the reaction of phenylisocyanate with cellulose. These include dimethylformamide (DMF), pyridine, and DMSO. The rate of derivative formation is affected by the choice of solvent (40), being fastest in DMSO and slowest in DMF. No degradation in the cellulose chain length was observed when the reaction was carried out in pyridine... [Pg.339]

The DS increase as a function of increasing the chain-length of the acyl group may be also attributed to hydrophobic interactions between the cellu-losic surface, whose hydrophobic character increases as a function of increasing DS, and the acylating species. This cooperative interaction. Fig. 10, may contribute to the activation enthalpy, as a result of desolvation of the entering species. Since association between the chains attached to cellulose and those... [Pg.135]

Which of the following are monodisperse polymers with respect to chain length (a) hevea rubber, (b) corn starch, (c) cellulose from cotton, (d) an enzyme, (e) HOPE, (f) PVC, (g) a specific DNA, (h) nylon 6,6, or (i) a specific RNA ... [Pg.47]

See other pages where Cellulose chain length is mentioned: [Pg.197]    [Pg.228]    [Pg.540]    [Pg.719]    [Pg.335]    [Pg.197]    [Pg.228]    [Pg.540]    [Pg.719]    [Pg.335]    [Pg.1027]    [Pg.296]    [Pg.276]    [Pg.249]    [Pg.251]    [Pg.265]    [Pg.625]    [Pg.625]    [Pg.628]    [Pg.389]    [Pg.1027]    [Pg.537]    [Pg.6]    [Pg.119]    [Pg.134]    [Pg.139]    [Pg.697]    [Pg.11]    [Pg.421]    [Pg.252]    [Pg.73]    [Pg.187]    [Pg.196]    [Pg.202]    [Pg.304]    [Pg.313]    [Pg.201]    [Pg.41]    [Pg.119]    [Pg.200]    [Pg.298]    [Pg.48]    [Pg.381]    [Pg.25]    [Pg.50]    [Pg.52]    [Pg.54]    [Pg.78]    [Pg.179]   
See also in sourсe #XX -- [ Pg.60 , Pg.230 ]



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Cellulose chains

Cellulosic chains

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