摘要:
A polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I2, measured according to ASTM D 1238 (2.16 kg @190°C), of from 0.9 to 5 g/10 min; density (measured according to ASTM D792) from 0.910 to 0.935 g/cc; a melt flow ratio, I 10 /I 2 , wherein I 10 is measured according to ASTM D 1238 (10 kg @ 190°C), of from 6 to 7.4; and molecular weight distribution (M w /M n ) of from 2.5 to 3.5 is provided.
摘要:
A polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefm comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I 2 , measured according to ASTM D 1238 (2.16 kg @190°C), of from 0.9 to 5 g/10 min; density (measured according to ASTM D792) from 0.910 to 0.935 g/cc; a melt flow ratio, I 10 /I 2 , wherein I 10 is measured according to ASTM D 1238 (10 kg @ 190°C), of from 6 to 7.4; and molecular weight distribution (Mw/Mn) of from 2.5 to 3.5 is provided.
摘要:
Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.