RADIOCHEMICAL YIELDS OF GRAFT POLYMERIZATION REACTIONS OF CELLULOSE
The preparation of radioinduced graft polymers of cotton cellulose, while retaining the fibrous nature and high molecular weight of the cellulose, depended primarily on the radiochemical yields of cellulose reactions and of graft polymerization reactions. Yields of the initial major molecular changes in cellulosic polymer indicated that, in the case of scission of the molecule and carboxyl group formation, chain reactions were not initiated by radiation; however, in the case of carbonyl group formation chain reactions were initiated but quickly terminated. Generally, experimental procedures, used in graft polymerization reactions, were: simultaneous irradiation reactions, that is, application of monomers or solutions of monomers to cellulose or chemically modified celluloses, then irradiation; and post-irradiation reactions, that is, irradiation of cellulose or chemically modified celluloses, then after removal from the field of radiation, contacting the irradiated cellulose with monomer. Some of the most important factors influencing the radiochemical yields of graft polymerization reactions, of styrene and acrylonitrile onto cellulose were: concentration of monomer in treating solution; solvent; ratio of monomer solution to cellulose; prior chemical modification of cellulose; and absence of oxygen, particularly in post-irradiation reactions. Experimental data are presented, and the direct and indirect effects of Co/sup 60/ gamma radiation on these reactions are discussed. (auth)
- Research Organization:
- Dept. of Agriculture, New Orleans, LA (United States). Southern Regional Research Lab.
- Sponsoring Organization:
- Sponsor not identified
- NSA Number:
- NSA-18-010176
- OSTI ID:
- 4879394
- Report Number(s):
- CONF-37-5; AED-Conf--63-248-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELLULOSE
CHEMICAL REACTIONS
CHEMICALS
CHEMISTRY
COBALT 60
CONFIGURATION
COTTON
CYANIDES
DECOMPOSITION
DIAGRAMS
EFFICIENCY
FIBERS
GAMMA RADIATION
GAMMA SOURCES
GASES
IRRADIATION
MEASURED VALUES
MOLECULES
OPERATION
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN
POLYMERIZATION
POLYMERS
PREPARATION
QUANTITY RATIO
RADIATION CHEMISTRY
REACTION KINETICS
SOLUTIONS
SOLVENTS
STYRENE
TABLES
TEXTILES
VARIATIONS
WEIGHT