It is shown that the system TiC14-(C2Hs)2AICI-(C6Hs)2Mg is highly efficient and very promising as a catalyst of the filling of polyethylene during the polymerization with inorganic fillers (chalk, marble powder, perlite, kaolin and dolomite). The preliminary activation of the filler, the formation t
Polymerization of 4-methylpentene-1 and its copolymerization with propylene on the TiCl3 + (C2H5)2AlCl complex catalyst
β Scribed by V.Sh. Shteinbak; V.V. Amerik; F.I. Yakobson; Yu.V. Kissin; D.V. Ivanyukov; B.A. Krentsel
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 720 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
The main kinetic laws governing 4-methylpentene-I (MP) polymerization and copolymerization with propylene (P) on the catalytic system TiCI 3 + (C2Hs)gAIC1 between 30 and 70 Β° were studied. The MP homopolymerization is kinetically first-order in monomer and TiCl> The effective activation energy is 8'5 kcal/mole. The active site concentrations in MP polymerization at various temperatures were evaluated. The copolymerization constants were determined: for P r, = 6-44 _+ 05: for MP r2 = 0.31 + 0"05. The structure of the copolymers was studied, some of their properties are described.
π SIMILAR VOLUMES
Polymerization of propylene was conducted at 0 -150Β°C with the [ArN(CH2)3NAr]TiClz (Ar = 2,6-'Pr2C6H3) complex using a mixture of ~a l k y l a l u m i n i ~ (AIR3, R = methyl, ethyl and isobutyl) and Ph3CB(C&& as cocatalyst. When AlMe3 or AlEt3 was employed, atactic polypropylene (PP) was selectivel
## Abstract The effect of varying ^14^CO contact time upon the concentration of active centres __C__\* in ethylene homopolymerization using the TiCl~4~/MgH~2~ Β· Al(C~2~H~5~)~3~ catalytic system shows that the polymer radioactivity, and hence __C__\*, increase sharply in the first sixty minutes of ^