METHOD FOR MEASURING A MODIFIED RATIO OF A POLYMER

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The present invention relates to a method for measuring a modification rate of a lanthanum-based rare earth metal-catalyzed conjugated diene polymer with a simple measurement process and the high measurement accuracy. The method performs calculation by equation 2, a modification rate (%) = (peak area of a modified polymer/peak area of non-modified polymer + peak area of a modified polymer) * 100 by using chromatogram obtained by the chromatographic measurement.(AA) Unmodified polymer unit elution section(BB) Modified polymer unit elution sectionCOPYRIGHT KIPO 2019