The role of hindered Lewis bases on the catalyst performance of TiCl3for propylene polymerization
β Scribed by Marcos A. S. Costa; Fernanda M. B. Coutinho
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 334 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0170-0839
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π SIMILAR VOLUMES
A systematic study has been made on the functions of external Lewis base (Be, methyl-p-toluate, MPT) and internal Lewis base (Bi, ethyl benzoate, EB) for the CW-catalyst system MgCl,/EB/PC/AlEt,/TiCl,-AlEt,/MF'T (PC, p-cresol). Bi is a nonstereoselective modifier. It increases the active site concen
Grignard reagent PhMgCl was added during the preparation of the catalyst system MgCl 2 /di-n-butyl phthalate (DNBP)/TiCl 4 {AlEt 3 /diphenyl dimethoxyl silane (DPDMS) to improve its performance. It was found that PhMgCl could enhance both the activity of the catalyst and the isotacticity of the prod
The influence o f Lewis bases on the s t e r e o s p e c i f i c i t y and p r o d u c t i v i t y o f c a t a l y t i c systems o f the type MgCl /TiC14/A1Rj as w e l l as on m i c r o t a c t i c i t y and molecular weight o f t8e polymer f r a c t i o n s has been systematically investigated usin