Novel spherical Ziegler–Natta catalyst for polymerization and copolymerization. I. Spherical MgCl2 support (pages 3112–3119)
Zhao-Yang Ye, Li Wang, Lian-Fang Feng, Xue-Ping Gu, Hai-Hua Chen, Pu-Yu Zhang, Jie Pan, Shan Jiang and Lin-Xian Feng
Article first published online: 26 JUL 2002 | DOI: 10.1002/pola.10398
Spherical MgCl2 adducts used as supports for a Ziegler–Natta catalyst for olefin polymerization were prepared by the general simple precipitation method. It is well known that active species supported on spherical MgCl2 adducts have made great progress in controlling polymer morphology as spherical particles. Spherical adducts were made under various conditions, and detailed investigations were made into the influence of MgCl2/EtOH (mol/mol) and the dispersion speeds on the particle size and particle size distribution. Moreover, the influence of ethanol on the crystal structure of MgCl2 was further examined, being considered the key point in the preparation of suitable supports for the latest generation Ziegler–Natta catalyst.