Research Article
Effect of Polymerization Conditions on Thermal and Mechanical Properties of Ethylene/1-Butene Copolymer Made with Ziegler-Natta Catalysts
Table 3
DSC analysis for copolymer samples (polymerization time 30 min).
| s/number | (bar) | 1-Butene fraction (mmol) | Poly. temp. (°C) | (bar) | (°C) | (°C) | % cryst. (cooling) |
| 1 | 5 | 71.3 | 60 | 1 | 117.89 | 130.12 | 46.32 | 2 | 5 | 71.3 | 60 | 2 | 116.86 | 128.76 | 49.54 | 3 | 5 | 71.3 | 60 | 3 | 115.52 | 125.92 | 53.86 | 4 | 5 | 71.3 | 80 | 1 | 116.91 | 128.36 | 48.13 | 5 | 5 | 71.3 | 80 | 2 | 115.42 | 127.37 | 52.03 | 6 | 5 | 71.3 | 80 | 3 | 114.37 | 124.73 | 56.57 | 7 | 5 | 142.6 | 60 | 1 | 116.83 | 129.54 | 48.60 | 8 | 5 | 142.6 | 60 | 2 | 115.52 | 127.31 | 52.44 | 9 | 5 | 142.6 | 60 | 3 | 114.63 | 124.82 | 55.58 | 10 | 5 | 142.6 | 80 | 1 | 115.34 | 127.43 | 50.83 | 11 | 5 | 142.6 | 80 | 2 | 114.45 | 125.86 | 53.61 | 12 | 5 | 142.6 | 80 | 3 | 113.92 | 123.99 | 56.63 | 13 | 10 | 71.3 | 60 | 1 | 119.55 | 133.14 | 51.75 | 14 | 10 | 71.3 | 60 | 2 | 118.56 | 131.81 | 54.86 | 15 | 10 | 71.3 | 60 | 3 | 117.94 | 129.77 | 57.08 | 16 | 10 | 71.3 | 80 | 1 | 118.34 | 131.99 | 53.19 | 17 | 10 | 71.3 | 80 | 2 | 116.57 | 129.68 | 56.83 | 18 | 10 | 71.3 | 80 | 3 | 115.29 | 128.40 | 59.12 | 19 | 10 | 142.6 | 60 | 1 | 118.67 | 130.83 | 53.21 | 20 | 10 | 142.6 | 60 | 2 | 116.79 | 128.90 | 56.50 | 21 | 10 | 142.6 | 60 | 3 | 115.80 | 126.09 | 61.63 | 22 | 10 | 142.6 | 80 | 1 | 116.77 | 128.93 | 55.66 | 23 | 10 | 142.6 | 80 | 2 | 115.12 | 127.09 | 59.10 | 24 | 10 | 142.6 | 80 | 3 | 114.69 | 125.91 | 63.62 |
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