Change of Morphological Properties in Drawing Water-Swollen Cellulose Films Prepared from Organic Solutions. a View of Molecular Orientation in the Drawing Process

Eiji Togawa, Tetsuo Kondo

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Drawable water-swollen cellulose films were prepared by coagulating in water two different cellulose organic solution systems. The drawability of the water-swollen films was dependent on the rate of coagulation. Transparent films prepared by the slow coagulation showed good drawability and had a maximum draw ratio of 2.0. However, the drawn films maintained the highly noncrystalline state even after dried at 50°C under vacuum. X-ray analysis and polarized FT-IR measurements performed under a saturated deuterium oxide vapor of these dried drawn films, prepared by slow coagulation, showed that their noncrystalline regions (more than 80%) as well as crystalline regions (less than 20%) were highly oriented by the drawing process. Furthermore, meridional intensity curves in the X-ray diffraction exhibited interesting patterns even though the drawn sample was highly noncrystalline. In fact, they are quite different from those in regenerated cellulose II fibers. However, despite this increase in draw ratio and in the orientation of the chains, the number of crystalline domains in the films did not increase significantly. This may perhaps be attributed to the three-dimensional network structure resulting from the intermolecular hydrogen bonds between chains which are maintained through the drawing process and which can hinder the crystallization of cellulose.

Original languageEnglish
Pages (from-to)451-459
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume37
Issue number5
DOIs
Publication statusPublished - Mar 1 1999
Externally publishedYes

Fingerprint

Cellulose films
Molecular orientation
cellulose
Coagulation
Water
Cellulose
coagulation
water
Deuterium Oxide
Crystalline materials
Heavy water
X ray analysis
Crystallization
heavy water
Crystal orientation
Hydrogen bonds
Vapors
Vacuum
x rays
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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title = "Change of Morphological Properties in Drawing Water-Swollen Cellulose Films Prepared from Organic Solutions. a View of Molecular Orientation in the Drawing Process",
abstract = "Drawable water-swollen cellulose films were prepared by coagulating in water two different cellulose organic solution systems. The drawability of the water-swollen films was dependent on the rate of coagulation. Transparent films prepared by the slow coagulation showed good drawability and had a maximum draw ratio of 2.0. However, the drawn films maintained the highly noncrystalline state even after dried at 50°C under vacuum. X-ray analysis and polarized FT-IR measurements performed under a saturated deuterium oxide vapor of these dried drawn films, prepared by slow coagulation, showed that their noncrystalline regions (more than 80{\%}) as well as crystalline regions (less than 20{\%}) were highly oriented by the drawing process. Furthermore, meridional intensity curves in the X-ray diffraction exhibited interesting patterns even though the drawn sample was highly noncrystalline. In fact, they are quite different from those in regenerated cellulose II fibers. However, despite this increase in draw ratio and in the orientation of the chains, the number of crystalline domains in the films did not increase significantly. This may perhaps be attributed to the three-dimensional network structure resulting from the intermolecular hydrogen bonds between chains which are maintained through the drawing process and which can hinder the crystallization of cellulose.",
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