An x‐ray study of partially benzylated cotton cellulose

Abstract

An X‐ray study has been made of partially benzylated cellulose obtained from mercerized cotton yarn, in accordance with a recently developed technique. This study reports the formation of a new crystal lattice for benzylcellulose with a degree of substitution less than 1. This new lattice is indicative of a considerable distension of the original cellulose II unit cell present in the mercerized yarn. Attempts to benzylate ramie fibers under the same conditions resulted in destruction of the fibrous structure by the treatment. Application of heat and tension were found to cause considerable improvement in crystallinity and degree of crystallite orientation of the benzylated cotton. Application of pressure in preparing the sample for X‐ray analysis in the usual manner was found to affects the X‐ray diffraction pattern, due possibly to distortion of the greatly distended (101) interplanar spacing.

Structure of a cellulose I–ethylenediamine complex

“…In 1956, Creely et a1. 6 proposed a monoclinic unit cell for the cellulose I-EDA complex, with dimensions: a = 12.2 A, b = 12.3 A, c = 10. 3 A, and y = 43.2O, and containing disaccharide residues of two chains.…”

X-Ray Diffractometer Thermal Technique for Study of Structural Changes in Cellulosic Compounds1

“…The sample was benzylated to about 0.8 benzyl group per anhydroglucose unit [ 5 ]. Crystallization may be noted to begin at a temperature of about 150° C and to approach a maximum at about 200° C as indicated by the sharpness and intensity of the selected diffraction peak.…”

“…Although the related reaction of vinyl sulfones with hydroxyl compounds has been generally known [3], the reaction shown in Equation 1 had not been reported in the literature until very recently [1,5]. Since p-oxyethyl sulfones are intermediates in the preparation of the corresponding vinyl sulfones, the use of these precursors for the chemical modification of polymers and fibers offers obvious economic advantages.…”

Variation in Fine Structure of Partially Benzylated Cotton Fibers With Increasing Degree of Substitution By X-Ray Study

“…Klein et al [8] studied the preparation and properties of partially benzylated cellulose with the aim of retaining the mechanical strength with increased yields by employing ternary systems. Following this, Creely et al [ 1 ] made an x-ray study of the partially benzylated cotton samples and proposed a unit cell for benzyl cellulose. They also studied the application of temperature and pressure.…”