Behaviour of cellulose tricarbanilate in dilute solution

Guthrie, James T.; Huglin, Malcolm B.; Richards, Roy J.; Shah, Vinay; Simpson, A.

doi:10.1016/0014-3057(75)90105-6

Cited by 20 publications

(6 citation statements)

References 16 publications

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“…This solubility feature is definitely advantageous to wide use of CTDC for stationary phases in liquid chromatography and distinct from that of cellulose tris(pheny1carbamate) (CTC), which dissolves in a number of common organic solvents (Refs. [10][11][12][13] despite the fact that the two derivatives differ only in the presence or absence of two methyl groups on the phenyl ring. Since CTDC has a higher optical resolution capacity in chromatography than does CTC, we took an interest in seeing whether, in addition to the solubility difference, there is some difference in molecular characteristics between the two derivatives, and measured intrinsic viscosities [77] for CTC fractions in NMP.…”

Section: Introductionmentioning

confidence: 99%

Solution properties of cellulose tris(3,5‐dimethyl‐phenylcarbamate)

Norisuye

Tsuboi

Sato

et al. 1997

Macromolecular Symposia

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The dilute-solution behavior and liquid crystal formation of cellulose tris(3,5-dimethylphenylcarbamate) (CTDC) in 1-methyl-2-pyrrolidone (NMP) at 25OC are discussed by summarizing our recent studies, and its molecular characteristics are compared with those of cellulose tris(pheny1carbamate) (CTC) in the same solvent. The molecular weight dependences of optical anisotropy factor, radius of gyration, intrinsic viscosity ([q]), and isotropic-cholesteric phase boundary concentration for CTDC are explained consistently by current theories based on the wormlike chain. An analysis of the newly measured [q] for CTC shows that the backbone conformation and chain stiffness are substantially the same for the two cellulose derivatives in NMP. However, a distinct difference in optical anisotropy is found and briefly discussed in relation to the higher optical resolution capacity of CTDC than that of CTC in chromatographic separation of racemic compounds.

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Section: Introductionmentioning

confidence: 99%

Solution properties of cellulose tris(3,5‐dimethyl‐phenylcarbamate)

Norisuye

Tsuboi

Sato

et al. 1997

Macromolecular Symposia

View full text Add to dashboard Cite

show abstract

“…As no D values are known for CTC in benzophenone, we employ d In D/dT = 1 X 10"3 deg"1 evaluated from the D(T) data for solutions in acetone and tetrahydrofuran. 19 We obtain d In Mh/dT = -2 X 10"3 deg"1 and d In d/dT = -0.5 X 10"3 deg"1.…”

Section: Parameters Si Andmentioning

confidence: 76%

“…(14) As was pointed out by a referee, an alternative explanation for the increase in crystallinity observed by Tanabe, Strobl, and Fischer (ref 1) could be the growth of new, thinner crystallites between those already present. Standard crystallization theory (e.g., ref 19) does indeed predict that crystal thickness decreases with decreasing temperature, and so at least on that account, the growth of new, thinner crystals makes sense. If new crystals do form, then the explanation given here is, of course, invalid.…”

Section: References and Notesmentioning

confidence: 99%

“…; Plenum: New York, 1984; Vol 1, p 271. (19) Hoffman, J. D.; Davis, G. T.; Lauritzen, J. I. Treatise Solid State Chem. 1976, 3.…”

Section: References and Notesmentioning

confidence: 99%

“…1976, 3. (20) The two semiempirical low-temperature approximations Ag = [AhtAT/TJf, for f = 2T/(Tm + T) or / = T/Tm (see ref 19) bring the low-temperature points in Figures 3-5 closer to the line, but discrepancies still exist. This may also be due to the known deficiencies of rubber elasticity theory at high extensions.…”

Section: References and Notesmentioning

confidence: 99%

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