| abstract |
PROBLEM TO BE SOLVED: To provide a polymer capable of obtaining a membrane having low water permeability or low water content, a sheet material having a layer containing the polymer, and a heat treatment method for the sheet material. . SOLUTION: A polymer composed of a monomer unit represented by the general formula (1) (W 1 represents H, an alkyl group, an aromatic group, a heterocyclic group, Y 1 represents a divalent linking group, and V represents a water-retaining group which at least partially vaporizes and disappears by heating.) A sheet material having a layer containing a coalescence and a heat treatment method for the sheet material. |