| 摘要 |
<p>(I) A propylene polymer satisfying the following requirements. 1) It has a 25°C hexane soluble content of 0 to 80 wt.%. 2) In DSC, it has no melting point (Tm (°C)) or has a Tm satisfying the relationship ΔH≥3x(Tm-120), wherein ΔH (J/g) is the melting endotherm. (II) A propylene homopolymer satisfying the following requirements. 1) It has a mesopentad content of 30 to 60 mol%. 2) It satisfies the relationship [rrrr/(1-mmmm)]≤0.1. 3) The content of components eluted at temperatures not higher than 25°C (W25) in temperature-rising chromatography is 20 to 100 wt.%. 4) It has a pentad content (rmrm) exceeding 2.5 mol.%. (III) A propylene copolymer satisfying the following requirements. 1) It has a stereoregularity index as determined by 13C-NMR of 55 to 90 mol%. 2) It has a W25 of 20 to 100 wt.%.</p> |
