Study of the effect of the monomer pressure on the copolymerization of ethylene with 1-hexene

✍ Scribed by Raul Quijada; René Rojas; Raquel S. Mauler; Griselda B. Galland; Rosangela B. Scipioni

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 189 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970627)64:13<2567::aid-app10>3.0.co;2-x

✦ Synopsis

The effect of ethylene pressure on the copolymerization of ethylene with 1hexene was studied. The results show an increasing of productivities (g of polymer/ n Zr h) with pressure. This tendency was not observed for the activity (g of polymer/ n Zr h bar) that decreases when pressure is raised. When varing the pressure, the characteristics and properties of the formed copolymers are in accordance with the expectation for changes in the monomer concentration; increasing the pressure causes a decrease in comonomer incorporation. At higher ethylene pressure, the polymer is more crystalline due to less incorporation of 1-hexene and the molecular weight is higher. The density of the copolymers also decreases with comonomer incorporation into the copolymer ᭧ 1997