Polyethylene powder and molded body thereof
A technology of polyethylene powder and components, applied in structural parts, electrochemical generators, battery pack parts, etc., can solve the problems of film rupture, insufficient melting and mixing, poor appearance of microporous film, etc., and achieve high mechanical strength. Effect
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[0247] Hereinafter, this embodiment will be described in more detail using specific examples and comparative examples, but this embodiment is not limited at all by the following examples and comparative examples.
[0248] The measurement methods of various characteristics and physical properties are as follows.
[0249] [Measurement methods of various properties and properties]
[0250] (1) Viscosity average molecular weight (Mv)
[0251] First, 20 mg of polyethylene powder was added to 20 mL of decalin (decalin), and stirred at 150° C. for 2 hours to dissolve the polyethylene powder to obtain a solution.
[0252] Use the Cannon-Fenske viscometer to measure the falling time (t s ).
[0253] Similarly, three kinds of solutions were prepared by changing the mass of polyethylene powder, and the falling time between marking lines was measured in the same manner as above.
[0254] As a blank, the drop time (t b ).
[0255] The reduced viscosity (η sp / C) is plotted, and the re...
manufacture example
[0327] [Production example] Synthesis of catalyst
[0328] [Synthesis of solid catalyst component [A-1]]
[0329]
[0330] 1 mol / L of Mg was put into an 8L stainless steel autoclave fully replaced with nitrogen 6 (C 4 h 9 ) 12 Al(C 2 h 5 ) 3 2000mL of hexane solution (equivalent to 2000mmol in terms of magnesium and aluminum), while stirring at 50°C, 146mL of 5.47mol / L n-butanol hexane solution was added dropwise for 3 hours, and washed with 300mL of hexane pipeline.
[0331] Stirring was then continued at 50°C for 2 hours. After completion of the reaction, it was cooled to normal temperature, and the obtained substance was used as a raw material (a-1). The raw material (a-1) was 0.712 mol / L in terms of the total concentration of magnesium and aluminum.
[0332]
[0333] 1 mol / L of Mg was put into an 8L stainless steel autoclave fully replaced with nitrogen 6 (C 4 h 9 ) 12 Al(C 2 h 5 ) 3 2000 mL of a hexane solution (equivalent to 2000 mmol in terms of mag...
Embodiment 1
[0344] A mixed gas of ethylene and hydrogen adjusted so that the concentration of hydrogen relative to ethylene was 10 mol % was dissolved in hexane by pressurizing it at 0.2 MPa to obtain hexane in which ethylene was dissolved.
[0345] Ethylene-dissolved hexane was introduced into a vessel-type 300 L polymerizer equipped with a stirring blade at a rate of 40 L / hour through a supply line.
[0346] Two catalyst supply lines were provided and adjusted so that one was introduced into a shallow portion of the polymerization slurry and the other was introduced into a deep portion of the polymerization slurry.
[0347] The catalyst was used after mixing the solid catalyst component [A-2] and the solid catalyst component [A-3] in equal amounts.
[0348] Two catalyst supply lines were installed and adjusted so that the catalyst line 1 was introduced into the part where the liquid surface of the polymerization slurry was shallow, and the catalyst line 2 was introduced into the part wh...
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