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Introduction Rare-earth coordination catalysts are known for their high activity and high stereospecificity in the polymerization of conjugated dienes.1-5 The copolymerization of styrene (St) with butadiene using rare earth catalyst was followed with interest soon as the rare earth coordination catalyst appeared in the early 1960s.6-14 Copolymerization of isoprene (IP) and St using coordination catalysts was reported in a few papers,10,15-18 among them only Jin et al.10 and our group18 repor… 相似文献
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