Polymerization of Styrene by Diphenylzinc-Additive Systems. Part V: Ph2Zn-Ind2ZrCl2-MAO Systems
Titel:
Polymerization of Styrene by Diphenylzinc-Additive Systems. Part V: Ph2Zn-Ind2ZrCl2-MAO Systems
Auteur:
Rabagliati, F. M. Terraza, C. A. Quijada, R.
Verschenen in:
International journal of polymeric materials
Paginering:
Jaargang 34 (1996) nr. 3-4 pagina's 163-168
Jaar:
1996-12-01
Inhoud:
Styrene was polymerized using various combined systems including diphenylzinc, Ph2Zn, bis(indenyl)zirconium dichloride. Ind2ZrCl2, and methylaluminoxane, MAO. Conversion to polystyrene depends on the combination used: Ph2Zn-Ind2ZrCl2-MAO, Ph2Zn-Ind2ZrCl2, Ind2ZrCl2-MAO or Ph2Zn/H2O-Ind2ZrCl2. Furthermore, for Ph2Zn-Ind2ZrCl2-MAO the maximum conversion to polymer was reached for molar ratio Ph2Zn/Ind2ZrCl2 equal unity. Polymers were predominantly atactic. A 5 to 10% fraction of insoluble in boiling butanone polymer was separated from the crude polystyrene. The amount of such fraction depends on the molar ratio Ph2Zn/Ind2ZrCl2 used.