Water-soluble copolymers. I. Synthesis of model dextran-g-polyacrylamides by Fe(II)/H/sub 2/O/sub 2/ initiation and characterization by aqueous size exclusion chromatography. [For use as viscosity modifiers for enhanced oil recovery]
Model graft copolymers were synthesized by grafting acrylamide onto dextram (anti M/sub w/ = 500,000) utilizing the Fe(II)/H/sub 2/O/sub 2/ initiation system. Aqueous size exclusion chromatography (SEC) was used to determine the effects of changing reaction parameters on hydrodynamic dimensions of the resulting graft copolymers. It was also possible to optimize reaction conditions yielding the highest viscosity graft copolymer with the least amount of homopolyacrylamide and unreacted substrate. The molecular structures of the graft copolymers were determined by elemental analysis, SEC, and solution viscometry. Selective hydrolysis of the dextran backbone allowed determination of average molecular weight of acrylamide grafts, number of grafting sites, and average molecular weight of the graft copolymers. Rheological studies indicated viscosity and pseudoplastic behavior were largely related to the graft length of the polyacrylamide side chains.
- Research Organization:
- Univ. of Southern Mississippi, Hattiesburg
- OSTI ID:
- 6525934
- Journal Information:
- J. Appl. Polym. Sci.; (United States), Vol. 26:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COPOLYMERS
CHEMICAL PREPARATION
GRAFT POLYMERS
ACRYLAMIDE
CHROMATOGRAPHY
DEXTRAN
ENHANCED RECOVERY
HYDROGEN PEROXIDE
HYDROLYSIS
IRON COMPOUNDS
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
OIL WELLS
RHEOLOGY
SOLUBILITY
VISCOSITY
WATER
AMIDES
BLOOD SUBSTITUTES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
DRUGS
HEMATOLOGIC AGENTS
HYDROGEN COMPOUNDS
LYSIS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PEROXIDES
POLYMERS
POLYSACCHARIDES
RECOVERY
SACCHARIDES
SEPARATION PROCESSES
SOLVOLYSIS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
WELLS
020300* - Petroleum- Drilling & Production
360401 - Polymers & Plastics- Preparation & Fabrication- (-1987)