z-logo
Premium
Some physical properties of films made from cellulose dissolved in solutions of nitrogen dioxide in dimethylformamide
Author(s) -
Venkateswaran A.,
Clermont L. P.
Publication year - 1974
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.1974.070180112
Subject(s) - vinyl alcohol , crystallinity , cellulose , cellophane , dissolution , relative humidity , sorption , materials science , dimethylformamide , polymer chemistry , nitrogen , moisture , nitrogen dioxide , chlorine dioxide , chemical engineering , adsorption , chemistry , inorganic chemistry , organic chemistry , solvent , polymer , composite material , physics , engineering , thermodynamics
Water‐soluble films of cellulose nitrate‐nitrite were prepared by dissolving bleached sulfite pulp in a solution of nitrogen dioxide in dimethylformamide (DMF) at room temperature and heating the solution at 70°C for about 3 hr. Their water sorption, fine structure, and electrical properties were measured and compared with those of three other films—one water soluble (poly(vinyl alcohol)) and two water insoluble (cellophane and a film prepared from a cellulose solution in the nitrogen dioxide–DMF mixture and cast immediately after the cellulose had dissolved at room temperature). A comparison between the properties of water‐soluble films and the poly(vinyl alcohol) film showed that the former had higher crystallinity, lower moisture absorption in the 0–80% relative humidity region, lower permittivity and a.c. conductance, and higher d.c. resistance. The DMF‐cast water‐insoluble film adsorbed less moisture than the cellophane film.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here