| http://www.w3.org/ns/prov#value | - By carrying out substantially the entire reaction in DMF, rather than merely the last stages, it has been found possible to obtain a highly soluble, high molecular weight product, with better control of the polymerization reaction (including control of such factors as reaction rate, viscosity, molecular weight, linearity of the polymer, solubility, and solids content), better reproducibility of th
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