Summary
Polyolefins having syndiotactic structure were obtained by using 1-methyl-1-ethylidene-(cyclopentadienyl-1′-fluorenyl) zirconium dichloride and methylaluminoxane as a catalyst. 1-Butene and 4-methyl-1-pentene gave crystalline polymers having syndiotactic structure, while 1-pentene, 1-hexene and 1-octene gave noncrystalline polymers having syndiotactic structure.
The identification of syndiotactic and isotactic polyolefins was made by 13C-NMR, X-ray diffraction, and differential scanning calorimetry.
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Asanuma, T., Nishimori, Y., Ito, M. et al. Preparation of syndiotactic polyolefins by using metallocene catalysts. Polymer Bulletin 25, 567–570 (1991). https://doi.org/10.1007/BF00293515
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DOI: https://doi.org/10.1007/BF00293515