Structural study of cellulosic fibers

Smith, J. K.; Kitchen, W. J.; Mutton, D. B.

doi:10.1002/polc.5070020145

Cited by 10 publications

(1 citation statement)

References 9 publications

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“…Smith and Gorman reported a similar analysis of electrochemical results in combination with the MD simulations. [24] They discussed several lowest-energy conformations and successfully explained the observed differences between rigid and flexible dendrimers. On the other hand, our analysis is based on the axial distribution functions, which gives us the advantage of visualizing the time-averaged distributions of many ferrocenyl groups at once.…”

Section: Full Papersmentioning

confidence: 98%

Photo‐ and Redox‐Active Dendritic Molecules with Soft, Layered Nanostructures

Kikuzawa

Nagata

Tahara

et al. 2006

Chemistry An Asian Journal

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Molecules with one photoactive group (porphyrin) and multiple redox-active groups (ferrocenes) are described. The molecules are based on dendritic frameworks, with the ferrocenyl groups attached at the "internal" positions and the porphyrin attached at the focal point, leading to a characteristic layer architecture. Molecules of up to the third generation were synthesized and examined. The results of 1H NMR spectroscopy and fluorescence quenching indicated that the ferrocenyl groups at the second layer approach the core porphyrin most closely, which is consistent with the results of molecular-dynamics simulations. The electrochemistry of the molecules was also examined in detail, and a new formula is proposed for the analysis of multiple-electron transfer in these "redox-pool" molecules.

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Section: Full Papersmentioning

confidence: 98%

Photo‐ and Redox‐Active Dendritic Molecules with Soft, Layered Nanostructures

Kikuzawa

Nagata

Tahara

et al. 2006

Chemistry An Asian Journal

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Physical Constants of Cellulose

Ganster

Fink

1999

The Wiley Database of Polymer Properties

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Strukturuntersuchungen an cellulosefasern verschiedenen verstreckungsgrades mittels IR‐reflexionsspektroskopie und deuteriumaustausch

Siesler¹,

Krässig²,

Grass³

et al. 1975

Angew. Makromol. Chem.

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ZUSAM M ENFASSU NG :Die Verstrcckung von Celluloseregeneratfasern beim Hcrstellungsprozel3 erhoht die molekularc Orientierung der Polymerketten und dient der Verbesserung der textilen Eigenschaften der betreffenden Fasern. Es wird einc neue Methode beschrieben, dic es crlaubt, oricnticrte Cellulosefasern bei gleichzeitig stattfindcndem Dcuteriumaustausch mit parallel und senkrecht zur Faserachse polarisiertem Licht IR-reflcxionsspektroskopisch (FMIR-Technik) zu untersuchen. Der Zusammenhang des dichroitischen Verhaltnisscs der vom Isotopenaustausch mit D z O nicht betroffcnen OH-Valen7schwingungsbande mit der Orientierung der kristallinen Bcreichc in Abhangigkcit von der Verstreckung der Cellulosefasern wird diskutiert. Weiterhin werden verschiedcne Moglichkeiten zur Bestimmung der Kristallinitat der untersuchten Fascrproben bcsprochen. SUMMARY:Successive drawing of regenerated cellulosic fibers increases the molccular orientation of the polymer chains and is widcly used for improving the tcnsilc properties of fibcrs. A new techniquc for the measurcmcnt of planc polarized IR-spectra of deutetated cellulosic fibers with the help of FMIR-rcflcction attachment is reported. The dichroism of the crystalline OH-stretching VibrdtiOn is related to the molecular orientation in dependence of thc extcnt of stretching of the cellulosic fibers. Various methods for the determination of thc degree of crystallinity in cellulosic fibers arc discussed.

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Structural study of cellulosic fibers

Cited by 10 publications

References 9 publications

Photo‐ and Redox‐Active Dendritic Molecules with Soft, Layered Nanostructures

Photo‐ and Redox‐Active Dendritic Molecules with Soft, Layered Nanostructures

Physical Constants of Cellulose

Strukturuntersuchungen an cellulosefasern verschiedenen verstreckungsgrades mittels IR‐reflexionsspektroskopie und deuteriumaustausch

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