A. Cochaux et al., PROPERTIES OF CELLULOSIC PULPS OBTAINED B Y OXIDATION SOLVOLYSIS FROMSPRUCE, POPLAR AND EUCALYPTUS-GLOBULUS - COMPARISON OF THEIR TEAR RESISTANCE, Cellulose Chemistry and Technology, 29(6), 1995, pp. 737-749
Strength characteristics of poplar, eucalyptus globulus and spruce oxy
gen-organo-solv pulps are lower compared to the corresponding kraft pu
lps. Dehydration properties of solvents are responsible for the lack o
f fibre flexibility and hydrolysis of polyoses in the fibre weak point
s. Oxidation by oxygen implies dislocation area formation. Dislocation
areas allow fibre cut during beating and diminution of tearing streng
th. Alkaline treatment improves strength properties oi poplar pulp due
to the solvation of polyoses, which increases fibre flexibility. On t
he contrary, the same treatment has no effect on spruce and eucalyptus
pulps. These differences of behaviour can be explained by the morphol
ogical specific structures of each wood.