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首页> 美国政府科技报告 >Novel Solution and Solid-State Properties of Ampholytic Ionomers from Ion-Pair Comonomers
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Novel Solution and Solid-State Properties of Ampholytic Ionomers from Ion-Pair Comonomers

机译：离子对共聚单体中两性离子聚合物的新溶液和固态特性

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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.

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