Polar polyolefin material and its preparation method and use

A polyolefin and polar technology, applied in the field of new polyolefin materials and their preparation, can solve the problems of reducing the molecular weight of copolymers, unfavorable polymer mechanical properties, etc., and achieve the effect of improving the activity of copolymerization

Active Publication Date: 2021-10-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of polar comonomers significantly reduces the molecular weight of the copolymer (Mn<10,000), which is detrimental to the mechanical properties of the polymer

Method used

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  • Polar polyolefin material and its preparation method and use
  • Polar polyolefin material and its preparation method and use
  • Polar polyolefin material and its preparation method and use

Examples

Experimental program
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preparation example Construction

[0032] In the preparation method of the present invention, the polymerization temperature is preferably 40-120°C, such as 80°C; the ethylene pressure is preferably 1-15 atmospheres (atm), more preferably 3-9 atm; as the dimerization of the first comonomer The concentration of cyclopentadiene monomer or ethylidene norbornene monomer polar olefin monomer in the reaction solvent can be 0.01~10mol / L, more preferably 0.1~4mol / L; as the pole of the second comonomer The concentration of polar norbornene monomers or polar terminal olefin monomers in the reaction solvent is preferably 0.01-10mol / L, more preferably 0.1-2mol / L; the polymerization time can be 0.1-12h, preferably 1-12 hours, for example about 1 hour.

[0033] In the present invention, the copolymerization reaction can be carried out in the presence of an additionally added organic solvent, that is, the copolymerization reaction is carried out in a solution, which can be called solution polymerization. Preferably, the orga...

Embodiment 1-10

[0040] Example 1-10: Preparation and performance testing of polar polyolefin materials

[0041] In the glove box, under a nitrogen atmosphere, the dicyclopentadiene monomer (DCPD) or Ethylidene norbornene monomer (ENB) and polar norbornene monomer or polar olefin monomer (5-norbornen-2-yl acetate (NB OAc ), 5-norbornene-2-methanol (NB OH ) or 10-undecylenic acid methyl ester (O1), 10-undecylenic acid (O2)), the respective molar concentrations are indicated in brackets after the corresponding comonomers. For example, when the total reactant volume is 30mL, for the random copolymer E / DCPD(1.5) / NB obtained in Example 1 OAc (0.5), the molar number of DCPD monomer is 45mmol, and NB OAc The molar number of the monomer is 15 mmol), and 20 μmol of the catalyst PO-Pd dissolved in 1 mL of dichloromethane is added to the reaction kettle. Then, connect the ethylene gas source pipeline to feed ethylene (monomer E) gas into the reactor, and after adjusting the ethylene pressure to 8atm,...

Embodiment 11-14

[0055] Examples 11-14: Mechanical property test of polar polyolefin materials

[0056] The polar polyolefin material obtained in the above embodiments 2, 3, 4 and 6 is made into a dumbbell-shaped sample (length 25mm*width 2mm*thickness 0.4mm), and the test of mechanical properties is carried out by a universal testing machine (UTM2502). The tensile strength and elongation at break results were obtained as figure 1 shown. Depend on figure 1 It can be seen that the polar polyolefin material of the present invention has excellent mechanical properties, its tensile strength is above about 20 MPa, even up to 40 MPa, and its elongation at break is above 400%, even up to 700% . Correspondingly, the polar polyolefin material of the present invention can have various applications, for example, it can be used as packaging material, automobile manufacturing material, electrical appliance manufacturing material, medical device manufacturing material or agricultural implement manufactur...

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Abstract

The invention relates to a novel polar polyolefin material and its preparation method and use. The polar polyolefin material is represented by the formula CH 2 =CH 2 The ethylene monomer represented by, the dicyclopentadiene monomer represented by the formula as the first comonomer, and the polar norbornene-based monomer represented by the formula or the polar norbornene monomer represented by the formula CH as the second comonomer 2 =CH‑(CH 2 ) m A random copolymer formed by the copolymerization reaction of polar olefinic monomers represented by ‑Z, or by the formula CH 2 =CH 2 The ethylene monomer represented by, the ethylidene norbornene monomer represented by the formula as the first comonomer, and the polar norbornene-based monomer represented by the formula as the second comonomer are formed by the copolymerization reaction Regular copolymers, wherein X, Y, m and Z are as defined herein. The novel polar polyolefin material of the invention can be prepared simply and effectively under mild conditions, and has excellent mechanical properties, so it can be used in various applications.

Description

technical field [0001] The invention belongs to the field of functional macromolecular polyolefin materials, and specifically relates to novel polyolefin materials and their preparation methods and applications. Background technique [0002] Since humans discovered and synthesized polymer materials, polymer materials have been applied to all aspects of human production and life due to their excellent mechanical and physical properties. Polymer materials with different properties can be realized by adjusting the composition and structure of polymers. The output of polyolefin materials accounts for more than half of the global plastics industry. Polyolefin materials have a simple chemical structure and low raw material cost. They are one of the excellent polymer materials, and polyethylene is widely used. polypropylene and more. Due to its excellent properties, it has been widely used in packaging, automobiles, electrical appliances, medical machinery, agricultural implement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F232/08C08F236/20C08F4/80
CPCC08F210/02C08F232/08C08F236/20C08F2500/03C08F4/80
Inventor 陈昶乐邹陈
Owner UNIV OF SCI & TECH OF CHINA
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