| 摘要 |
PURPOSE:To obtain the title high-MW thermoreversibly hydrophilic and hydrophobic polymer excellent in strength and capable of being insolubilized in water when warmed, by radical-polymerizing N-isopropylacrylamide in a benzene solvent at a specified temperature. CONSTITUTION:N-Isopropylacrylamide is dissolved in a benzene solvent to form a solution of a concentration of 1-80wt% and radical-polymerized at 5-40 deg.C, preferably, 20-30 deg.C in the presence of, optionally, 0.001-5wt%, based on the vinyl compound, polymerization initiator (e.g., azobisisobutyronitrile) to give the title polymer which is poly(N-isopropylacrylamide) having an intrinsic viscosity >=1.00 (in tetrahydrofuran at 27 deg.C). This polymer is a thermoreversibly hydrophilic and hydrophobic polymer which is insolubilized in water when warmed and is useful for light-screening bodies, temperature sensors, adsorbents, toys, interiors, separative membranes, etc.
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