1. Molecular Weights of Lignosulphonate and Carbohydrate Leached from Sulphite Chemimechanical Pulp
- Author
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J. M. Willis, W. Q. Yean, D. A. I. Goring Pulp, and null Paper Research Institute of Canada
- Subjects
inorganic chemicals ,Molecular mass ,General Chemical Engineering ,Pulp (paper) ,technology, industry, and agriculture ,General Chemistry ,Carbohydrate ,engineering.material ,equipment and supplies ,complex mixtures ,chemistry.chemical_compound ,chemistry ,Biochemistry ,engineering ,Lignin ,General Materials Science ,Leaching (metallurgy) ,Nuclear chemistry ,Macromolecule - Abstract
The molecular weights of both the lignosulphonate and carbohydrate fractions leached from sulphite chemimechanical pulps Increased as the leaching proceeded. Lignosulphonate molecular weights rose from 11000 to 61000. Values for the carbohydrate fractions were lower, ranging from 6000 to 17000. For the lignin, the diameter of the equivalent sphere corresponding to the whole sample leached was considerably Higher then the medium-pore diameter of the fiber. This discrepancy Indicated that the lignosulphonate macromolecule in the fiber wall adopted a flat conformation.
- Published
- 1987
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