KR910000820A - 4-methylpentene-1 polymer - Google Patents

Abstract

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Description

4-methylpentene-1 polymer

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1 is an absorption spectrum of ¹³ C-NMR of poly 4-methylpentene-1 obtained in Example 1, wherein a is syndiotactic poly 4-methylpentene-1 and b is isotactic poly 4-methylpentene-1. .

2 is an infrared absorption spectrum of syndiotactic poly 4-methylpentene-1 obtained in Example 1. FIG.

3 is an infrared absorption spectrum of isotactic poly 4-methylpentene-1 obtained in Example 1. FIG.

Claims (11)

A polymer of 4-methylpentene-1 characterized by containing 0-30 mol% of α-olefin units other than 4-methylpentene-1 unit and having a syndiotactic structure. 2. The polymer of claim 1 wherein the polymer is highly stereoregular, containing no low stereoregular 4-methylpentene-1 polymer. The polymer of claim 2 wherein the crystallization temperature measured by dissolving the polymer at 300 ° C. and then lowering at a rate of 10 ° C. per minute is 160 ° C. or higher. The polymer of claim 2 wherein the polymer is 1.5-20 bars of the weight average molecular weight and the number average molecular weight. Absorption intensity observed at about 43.1 ppm based on tetramethylsilane in the absorption spectrum of ¹³ C -NMR measured by 1,2,4-trichlorobenzene solution is the sum of the absorption strengths observed at about 42-44 ppm. 4-methylpentene-1 having a syndiotactic structure, characterized in that 0.5 or more, molecular weight measured by gel permeation chromatography is 1000 or more, and the maximum diffraction line is observed at about 9A of the angle dogs by X-ray diffraction. Homopolymers. Absorption intensity observed at about 43.1 ppm based on tetramethylsilane in the absorption spectrum of ¹³ C -NMR measured with 1,2,4-trichlorobenzene solution is about 42.0-43.5 ppm Syndiotactic poly 4-methylpentene-1, characterized in that the sum is 0.5 or more, and the molecular weight measured by gel permeation chromatography is 1000 or more. Absorption intensity of 4-methylpentene-1 unit observed at about 43.1 ppm based on tetramethylsilane in the absorption spectrum of ¹³ C -NMR measured with 1,2,4-trichlorobenzene solution. It is 0.3 or more of the total absorption intensity of 4-methylpentene-1 unit observed at 44 ppm, and contains 0.1-30 mol% of α-olefin units other than 4-methylpentene-1 unit, and it is the tetralin solution at 135 degreeC A copolymer of 4-methylpentene-1 with other α-olefins having a syndiotactic structure, characterized in that the measured ultimate viscosity is at least 0.05. The copolymer according to claim 7, wherein the α-olefins other than 4-methylpentene-1 are linear or branched α-olefins having 2 to 25 carbon atoms. The copolymer according to claim 7, wherein the ratio of the weight average molecular weight and the number average molecular weight is 1.5-20. 9. The copolymer of claim 8 wherein the straight chain α-olefin is ethylene or propylene. In the absorption spectrum of ¹³ C-NMR measured with 1,2,4-trichlorobenzene solution, the absorption intensity of 4-methylpentene-1 unit observed at about 43.1 ppm based on tetramethylsilane was about 42.5-. 4-methyl with a minimum viscosity of at least 0.5, a propylene content of 0.1 wt% -20 wt%, and an intrinsic viscosity of at least 0.05 at tetrahydrochloric acid at 135.degree. Pentene-1 and propylene copolymers. ※ Note: The disclosure is based on the initial application.