Novel Solution and Solid-State Properties of Ampholytic Ionomers from Ion-Pair Comonomers.
Final rept. 1 Jul 83-30 Jun 86,
LOWELL UNIV MA
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This investigation was concerned with the preparation of several types of ampholytic polymers for studies in drag reduction, water uptake, and apparent molecular weight as a function of added electrolyte. The polyampholytes studied have included an alternating copolymer of 4-vinyl-N-methylpyridinium methylsulfate and two random copolymers of 3-methacrylamidotrimethylammonium 2-acrylamido-2-methylpropanesulfonate and 2-methacryloyloxyethyltrimethylammonium 2-methacryloyloxyethanesulfonate. In general, as the salt concentration increased the apparent molecular weight decreased however, the intrinsic viscosity usually increased while this effect occurred. Drag reduction studies showed that ampholytic ionomers based on polyacrylamide had very good drag reducing abilities, and were also highly shear stable. As part of this investigation, aqueous salt absorption studies of graft copolymers were also studied. The results revealed that the ampholytic graft materials were able to absorb more salt solution than deionized water, thus behaving similarly to their non-crosslinked analogs. Keywords Ion pair comonomer Drag reduction Apparent molecular weight Ampholytic polymers.
- *MOLECULAR WEIGHT
- *DRAG REDUCTION
- SHEAR PROPERTIES
- GRAFT POLYMERIZATION
- SOLID STATE CHEMISTRY
- Atomic and Molecular Physics and Spectroscopy