Research Article
Effect of Polymerization Conditions on Thermal and Mechanical Properties of Ethylene/1-Butene Copolymer Made with Ziegler-Natta Catalysts
Table 2
Activation energy for copolymer samples (polymerization time: 30 min).
| | s/number | (bar) | 1-Butene fraction (mmol) | Poly.
temp. (°C) | (bar) | Activation energy (kJ/mol) | MW (g/mol) |
| | 1 | 5 | 71.3 | 60 | 1 | 253.9 | 162534 | | 2 | 5 | 71.3 | 60 | 2 | 243.7 | 149653 | | 3 | 5 | 71.3 | 60 | 3 | 214.4 | 123342 | | 4 | 5 | 71.3 | 80 | 1 | 225.1 | 132669 | | 5 | 5 | 71.3 | 80 | 2 | 213.9 | 119172 | | 6 | 5 | 71.3 | 80 | 3 | 198.4 | 107637 | | 7 | 5 | 142.6 | 60 | 1 | 235.4 | 144653 | | 8 | 5 | 142.6 | 60 | 2 | 223.4 | 130350 | | 9 | 5 | 142.6 | 60 | 3 | 214.1 | 121622 | | 10 | 5 | 142.6 | 80 | 1 | 220.5 | 129823 | | 11 | 5 | 142.6 | 80 | 2 | 194.1 | 101153 | | 12 | 5 | 142.6 | 80 | 3 | 183.9 | 91842 | | 13 | 10 | 71.3 | 60 | 1 | 265.8 | 176583 | | 14 | 10 | 71.3 | 60 | 2 | 248.6 | 159136 | | 15 | 10 | 71.3 | 60 | 3 | 218.3 | 131776 | | 16 | 10 | 71.3 | 80 | 1 | 232.6 | 141970 | | 17 | 10 | 71.3 | 80 | 2 | 214.8 | 123435 | | 18 | 10 | 71.3 | 80 | 3 | 204.7 | 112062 | | 19 | 10 | 142.6 | 60 | 1 | 243.6 | 156754 | | 20 | 10 | 142.6 | 60 | 2 | 233.4 | 142238 | | 21 | 10 | 142.6 | 60 | 3 | 217.4 | 126835 | | 22 | 10 | 142.6 | 80 | 1 | 227.8 | 135454 | | 23 | 10 | 142.6 | 80 | 2 | 206.1 | 116068 | | 24 | 10 | 142.6 | 80 | 3 | 188.6 | 96752 |
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