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Formation and characterization of cellulose films from a liquid crystalline solution of cellulose in ammonia/ammonium thiocyanate
Author(s) -
Chen YueShen,
Yang Kap Seung,
Cuculo John A.
Publication year - 1990
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1990.070410310
Subject(s) - crystallinity , cellulose , ammonium thiocyanate , thiocyanate , materials science , chemical engineering , solvent , ammonia , phase (matter) , polymer chemistry , organic chemistry , chemistry , composite material , engineering
Films were cast from liquid crystalline solutions of cellulose in an ammonia (NH 3 )/ammonium thiocyanate (NH 4 SCN) solvent. Microscopic examination of the cellulose liquid crystalline solutions used for the film formation exhibited the so‐called conjugated phase. It displayed a fingerprint and a uniformly dispersed highly birefringent pattern. Without additives, the films made from these liquid crystalline solutions are clear, flexible, and have high strength comparable to commercial Cellophone® films. The infrared crystallinity index of the film was somewhat higher than that of other cellulose II materials.