A method of producing a polymer comprising contacting in a reaction zone under conditions suitable for polymerization of an alpha-olefin monomer with a metallocene catalyst having at least three asymmetric centers, and recovering an alpha-olefin polymer from the reaction zone. A method of polymerizing propylene comprising contacting in a reaction zone propylene, a cocatalyst, and a metallocene catalyst having the formula including stereoisomers:
and recovering polypropylene from the reaction zone. A polypropylene composition having a tensile modulus from 40,000 psi to 300,000 psi, a tensile strength at yield from 2,000 psi to 6,000 psi, a tensile strength at break from 1,000 psi to 3,500 psi, a tensile strength from 1,000 psi to 5,000 Kpsi, an elongation at yield of greater than or equal to 10%, and an elongation at break from 50% to 500%.
一种生产聚合物的方法,包括在适合聚合α-烯烃单体的反应区内与具有至少三个不对称中心的
金属茂催化剂接触,并从反应区中回收α-烯烃聚合物。一种聚合
丙烯的方法,包括在反应区内接触
丙烯、一个辅助催化剂和具有包括立体异构体的配方的
金属茂催化剂,并从反应区中回收聚
丙烯。一种聚
丙烯组合物,其拉伸模量为40,000 psi至300,000 psi,屈服拉伸强度为2,000 psi至6,000 psi,断裂拉伸强度为1,000 psi至3,500 psi,拉伸强度为1,000 psi至5,000 Kpsi,屈服伸长率大于或等于10%,断裂伸长率为50%至500%。