Copolymerization of poly(propylene) macromonomer with ethylene by (tert-butanamide)dimethyl(tetramethyl-η5-cyclopentadienyl)silanetitanium dichloride/methylaluminoxane catalyst
✍ Scribed by Takeshi Shiono; Yuji Moriki; Tomiki Ikeda; Kazuo Soga
- Book ID
- 102484583
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 406 KB
- Volume
- 198
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The copolymerization of ethylene and a poly(propylene) macromonomer, the number‐average polymerization degree (P~n~) of which was about 11, was conducted with (tert‐butanamide)dimethyl(tetramethyl‐η^5^‐cyclopentadienyl)silanetitanium dichloride (CGC‐Ti) combined with methylaluminoxane. The rate of ethylene consumption is increased by adding the macromonomer when copolymerization was carried out at 40°C, whereas such rate enhancement could not be observed at 90°C. It was found that the increase of ethylene polymerization rate is accompanied by the incorporation of the macromonomer. Based on differential scanning calorimetry (DSC) and ^13^C NMR measurements of the produced polymers, it was proved that the poly(propylene) macromonomer was copolymerized with the present CGC‐Ti catalyst and the P~n~ value of the macromonomer incorporated in the copolymer does not influence the conversion of the macromonomer.