| 摘要 |
PURPOSE:To obtain the subject new polymer which is an alpha-olefin addition polymer of a specific number of carbon atoms having a peak of methylene groups in the backbone chain on the higher magnetic field side of peaks of isotactic bonds in <13>C-NMR, specific molecular weight and high stereoregularity. CONSTITUTION:The objective polymer, obtained by polymerizing a >=4C alpha-olefin (e.g. butene-1) at 25 deg.C for 5hr using methylaluminoxane as a catalyst in an autoclave and having a new structure of the absorption peak, assigned to methylene groups directly bound to the backbone chain in <13>C-NMR measured in 1,2,4-trichlorobenzene and observed as one peak on the higher magnetic field side at the position of the absorption peak assigned to isotactic bonds with its absorption intensity of >=0.3 based on the total sum of absorption peaks of methylene groups directly bound to the backbone chain and >=1000 molecular weight expressed in terms of polypropylene measured by gel permeation chromatography (GPC). |
