AbstractIn order to characterize a polymer by its reduced viscosity, it is necessary to put it into solution. For polymer made by emulsion polymerization, this usually involves coagulating the latex, washing and drying the coagulum, and then dissolving the residue in an organic solvent. The method fails when the polymer crosslinks on drying, as is the case with some adhesive resins. The method proposed here uses mixtures ofN‐methylpyrrolidone (NMP) and tetrahydrofuran (THF) to put the polymer directly into solution without removing the water. The technique is applicable to many polymers and copolymers of ethyl acrylate and vinyl acetat
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