| http://www.w3.org/ns/prov#value | - In the embodiment of the invention in which methylene chloride or chloroform is employed as the solvent and an aliphatic hydrocarbon, such as hexane or heptane, is employed as the nonsolvent, vigorous agitation is sufficient to supply the small quantity of energy required to vaporize the requisite quantity of solvent to initiate phase separation of the PLA.
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