Novel cellulose derivatives. I. Liquid crystal phase formation in tri-O-α-naphthylmethyl cellulose solutions
✍ Scribed by Vipul Davé; Charles E. Frazier; Wolfgang G. Glasser
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 778 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Tri-0-a-naphthylmethyl cellulose was prepared by homogeneous phase reaction using SO2diethylamine (DEA) -dimethyl sulfoxide (DMSO) as the solvent system. Observations made by dynamic mechanical spectrometry and by cross-polarized optical microscopy revealed liquid crystalline behavior for the concentrated solutions of tri-0-a-naphthylmethyl cellulose in dimethylacetamide ( DMAc ) . Experimental and calculated (predicted) critical volume fraction of the derivative, Vk, did not show agreement. It is determined that V i is affected by bulky substituents on the cellulose backbone to some extent.