Effect of ethylamine treatment on the dielectric properties and crystallinity of cellulose. I

摘要

AbstractA study of dielectric properties and crystallinity by x‐ray diffraction was made of ramie, cotton linters, bleached sulfite pulp, and cellophane. These cellulosic materials were treated with various concentrations of ethylamine in water. A linear relationship was found to exist between dielectric constant and crystallinity. The results also indicated that both dielectric constant and loss factor of ethylamine‐treated cellulose obeyed anomalous dispersion and absorption. The difference in density of untreated and treated samples was not significant for the range of crystallinity change observed by ethylamine treatment. In calculating the intrinsic dielectric constants of cellulose of different crystallinities the density of crystalline cellulose was used for the purposes of compari