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Polyolefin composition, preparation method and application thereof

A technology for polyolefin and composition, applied in the field of polyolefin composition and its preparation, can solve the problems of high cost and difficult operation, etc.

Active Publication Date: 2020-09-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this kind of mLDPE is produced using a specific metallocene catalyst, which is expensive
ExxonMobil uses a blend of 80% VLDPE (ultra-low density polyethylene) and 20% LDPE as a co-extrusion surface layer, and prepares BOPE through a 5-layer co-extrusion process of polyethylene and polypropylene. The defect of this process is that Difficult to operate

Method used

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  • Polyolefin composition, preparation method and application thereof
  • Polyolefin composition, preparation method and application thereof
  • Polyolefin composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] in such as figure 1 Shown interior has in the fluidized-bed reactor 2 of nitrogen fluidization, at first by pipeline 11 with the flow rate of 0.1kg / h, input a small amount of Ziegler-Natta catalyst continuously (solid component is loaded with TiCl 3 magnesium chloride, cocatalyst is triethylaluminum, Al:Ti=60), and input ethylene through pipeline 14, pipeline 15 input 1-butene and 1-hexene and pipeline 16 input a small amount of isopentane condensing agent . Then gradually increase the flow rate of the Ziegler-Natta catalyst to 5 kg / h, gradually increase the flow rate of isopentane, and keep the fluidization gas velocity constant. As the reaction progresses, ethylene is continuously input through pipeline 14, and 1-butene raw material gas is continuously input through pipeline 15, thereby forming a circulating medium in the fluidized bed reactor. Among them, the components and contents in the circulating medium are as follows: 35.2mol% ethylene, 0.8mol% 1-butene, 3.9m...

Embodiment 2

[0068] Prepare 1-butene / 1-hexene / ethylene copolymer in the same manner as in Example 1, the difference is only:

[0069] The components and contents in the circulating medium are as follows: 30.6 mol% ethylene, 0.7 mol% 1-butene, 3.6 mol% 1-hexene, 4.1 mol% hydrogen, 40.9 mol% nitrogen and 20.1 mol% isopentane.

[0070] Test the properties of the prepared 1-butene / 1-hexene / ethylene copolymer, wherein the content of the structural unit derived from 1-butene is 0.43mol%, and the content of the structural unit derived from 1-hexene is 2.64mol%, the remaining results are shown in Table 1, Table 2 and Table 3.

Embodiment 3

[0072] Prepare 1-butene / 1-hexene / ethylene copolymer in the same manner as in Example 1, the difference is only:

[0073] The components and contents in the circulating medium are as follows: 28.7 mol% ethylene, 0.5 mol% 1-butene, 3.4 mol% 1-hexene, 3.8 mol% hydrogen, 46.2 mol% nitrogen and 17.4 mol% isopentane.

[0074] Test the properties of the prepared 1-butene / 1-hexene / ethylene copolymer, wherein the content of the structural unit derived from 1-butene is 0.30mol%, and the content of the structural unit derived from 1-hexene is 2.55mol%, and the remaining results are shown in Table 1, Table 2 and Table 3.

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Abstract

The invention relates to a polyolefin composition, which comprises an ethylene / C3-C5[alpha]-olefin / C6-C9[alpha]-olefin copolymer, wherein the content of a structural unit derived from C3-C5[alpha]-olefin is 0.2 mol% to 0.6 mol%, and / or the content of a structural unit derived from C6-C9[alpha]-olefin is 2.5 mol% to 3.0 mol%. By using an ethylene / C3-C5[alpha]-olefin / C6-C9[alpha]-olefin copolymer having a specific structural unit and defining the content of the specific structural unit in the copolymer within a specific range, a polyolefin composition is imparted with a wide processing temperature range and good tensile properties.

Description

technical field [0001] The invention relates to the field of polyolefin materials, in particular to a polyolefin composition and its preparation method and application. Background technique [0002] Biaxially Oriented Polyethylene (BOPE) is a polyethylene film made by applying polymer biaxial stretching technology, that is, between the glass transition temperature and melting point of polyethylene, the non-oriented sheet is first longitudinally After stretching successively in the transverse direction, the molecular chains have bidirectional orientation in the plane, and finally cooled and shaped under tension. BOPE has uniform thickness, high tensile strength, strong puncture resistance, high heat-sealing strength, environmental protection, excellent barrier properties and low temperature resistance. It is mainly used in composite films today to ensure that the strength of the film will not decrease. Down, play the role of thinning. For example, BOPE can be combined with ...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/08C08F210/14
CPCC08F210/16C08F210/08C08F210/14
Inventor 孙婧元李羽王靖岱蒋斌波阳永荣黄正梁杨遥廖祖维陈湛旻叶姝瑶俞彬彬王洁李存军程佳楠
Owner ZHEJIANG UNIV
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