Research Article
Thermal Stability of Shear-Induced Precursors and Their Effect on the Crystalline Structure of β-Nucleated Isotactic Polypropylene
Table 1
Relative β-phase content and relative shear efficiency of β-nucleated iPP under different relaxed conditions.
| Crystallization condition | Relaxation temperature (°C) | Relaxation time (min) | RSE | |
| Quiescent | — | — | 0 | 0.97 | Sheared | — | — | 1 | 0.81 | Partially relaxed | 170 | 5 | 0.92 | 0.87 | 170 | 10 | 0.83 | 0.92 | 170 | 15 | 0.75 | 0.95 | 170 | 30 | 0.48 | 0.97 | 180 | 2 | 0.86 | 0.93 | 180 | 5 | 0.73 | 0.96 | 190 | 2 | 0.76 | 0.95 | 190 | 3 | 0.53 | 0.96 | 190 | 5 | 0.42 | 0.97 |
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