the present invention provides a method for separating one or more selected polymer from a mixture of polymers , as well as the recycled solid polymer product produced by the present method of the invention . one method of the present invention involves dissolving a mixture of polymers in a solvent to produce a solution , then cooling the solution to a temperature at which at least one of the selected polymers precipitates in the form of a solid . the solid is then separated from the suspension before being washed in a solvent at a temperature that is higher than the dissolving temperature , in order to produce a washed solid . the washed solid is separated from the second solvent . in one variant of the method , the suspension produced in the cooling step is treated with an added solvent .