Ethylene polymer, stretched molded body, microporous film, and fiber
一种乙烯聚合物、等温结晶的技术，应用在微孔膜和纤维领域，能够解决孔坍塌、膜均匀性变差等问题，达到强度和尺寸精度优良、温度响应快、加工性和生产稳定性优良的效果
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Embodiment 1
[0233] [Example 1] (polymerization of ethylene polymer)
[0234]Hexane, ethylene, hydrogen, and catalyst were continuously supplied to a container-type 300L polymerization reactor equipped with MAXBLEND stirring blades. The polymerization pressure was 0.8 MPa. The polymerization temperature was maintained at 75°C by jacket cooling. Hexane was adjusted to 20° C. and supplied from the bottom of the polymerizer at 32 L / hour. For the solid catalyst component [A], the above-mentioned solvent hexane was used as a transfer liquid, adjusted to 10° C., and added from the bottom of the polymerizer at a rate of 0.2 g / hour, and triisobutylaluminum was adjusted to 20° C. and The addition was from the middle of the polymerizer at a rate of 5 mmol / hr, the Tebbe reagent was adjusted to 25°C and the addition was made from the bottom of the polymerizer at a rate of 0.3 micromol / hr. Ethylene and hydrogen were introduced into the gas phase, and hydrogen was continuously supplied with a pump so...
Embodiment 2
[0238] In the polymerization process, set the polymerization temperature to 75°C and the polymerization pressure to 0.35 MPa, use the solid catalyst component [B] instead of the solid catalyst component [A], do not use Tebbe's reagent, and set triisobutylaluminum to 3 mmol / hour, the hydrogen concentration is set to 4200ppm, except that, by the same operation as Example 1, the viscosity-average molecular weight obtained is 200 × 10 4 g / mole of the ethylene polymer of Example 2. Table 1 shows the physical properties of the obtained ethylene polymer.
Embodiment 3
[0240] In the polymerization step, set the polymerization temperature to 69°C and the polymerization pressure to 0.40 MPa, use the solid catalyst component [B] instead of the solid catalyst component [A], do not use Tebbe's reagent, and set triisobutylaluminum to 3 mmol / hour, hydrogen is set to 600ppm, and 0.11mol% of 1-butene is introduced from the gas phase relative to ethylene, except that, by the same operation as Example 1, a viscosity-average molecular weight of 300×10 was obtained. 4 g / mol, the 1-butene content in the ethylene polymer is the ethylene polymer of Example 3 of 0.03 mol%. Table 1 shows the physical properties of the obtained ethylene polymer.
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