| 摘要 |
PURPOSE:To obtain the subject crystalline molding having a specified crystalline structure by molding a polybutene having syndiotactic structure. CONSTITUTION:An objective molding obtained by molding a polybutene (polybutene-1 preferably having >=0.7 syndiotactic pentad fraction) having substantially syndiotactic structure and having a rhombic system in which a=16.9, b=6.05 and c=7.78Angstrom as the lattice constant determined by X-ray diffraction. |
