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A kind of preparation method of ethylene-undecenyl alcohol copolymer and ultrahigh molecular weight polyethylene mixture

A technology of ultra-high molecular weight and polyethylene, which is applied in the field of olefin polymerization reaction technology, can solve the problems of product molecular weight decrease, accelerate the chain transfer process of ethylene homopolymerization catalyst, and reduce the polymerization activity of catalyst, so as to achieve the improvement of hydrophilicity and processability , low entanglement effect

Active Publication Date: 2016-11-23
HANGZHOU SHUANGAN SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the introduction of polar monomers, the higher the concentration of polar monomers, the greater the content of polar functional groups in the prepared polar polymers. However, a large number of heteroatoms in polar monomers, such as oxygen atoms, can accelerate the ethylene The chain transfer process of the homopolymerization catalyst, so that the polymerization activity of the catalyst is reduced, and the molecular weight of the product is greatly reduced

Method used

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  • A kind of preparation method of ethylene-undecenyl alcohol copolymer and ultrahigh molecular weight polyethylene mixture
  • A kind of preparation method of ethylene-undecenyl alcohol copolymer and ultrahigh molecular weight polyethylene mixture
  • A kind of preparation method of ethylene-undecenyl alcohol copolymer and ultrahigh molecular weight polyethylene mixture

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Experimental program
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Effect test

Embodiment 1

[0048] The preparation method of ultra-high molecular weight polyethylene and poly(ethylene-undecenyl alcohol) has the following steps:

[0049] VCl 3 The catalyst is weighed according to the weight ratio of V atoms to the silica carrier of 1 wt%, and then added to the toluene solution and stirred for 1 hour to obtain solid particles; the solid particles are washed 5 times with toluene solution, and then the solid particles are dried to a free-flowing state to obtain the catalyst a. Polystyrene is weighed according to polystyrene accounting for 30% of the weight of silicon dioxide, dissolved in toluene, prepared into a homogeneous polymer solution and mixed with the above-mentioned catalyst A to obtain a mixed solution; introduce steam form into the mixed solution n-hexane, so that polystyrene is deposited on the catalyst A, and the introduction rate of n-hexane is 1ml / min; after the catalyst A deposited by the polymer is washed 3 times in n-hexane, it is dried to a free-flow...

Embodiment 2

[0054] VCl 3 The catalyst is weighed according to the weight ratio of V atoms to the silica carrier 5wt%, and then added to the toluene solution and stirred for 1 hour to obtain solid particles; the solid particles are washed 5 times with toluene solution, and then the solid particles are dried to a free-flowing state to obtain the catalyst a. Polystyrene is weighed according to polystyrene accounting for 100% of the weight of silicon dioxide, dissolved in toluene, prepared into a homogeneous polymer solution and mixed with the above-mentioned catalyst A to obtain a mixed solution; introduce steam form into the mixed solution n-hexane, so that polystyrene is deposited on the catalyst A, and the introduction rate of n-hexane is 10ml / min; after the catalyst A deposited by the polymer is washed 3 times in n-hexane, it is dried to a free-flowing state to obtain catalyst B; Weigh iron acetylacetonate according to the weight ratio of 0.5wt% of metal atom in acetylacetonate compound...

Embodiment 3

[0058] The preparation method of embodiment 3 ultra-high molecular weight polyethylene and poly(ethylene-undecenyl alcohol), has the following steps:

[0059] VCl 3 The catalyst was weighed according to 0.1wt% of the weight ratio of V atoms to the silica carrier, and then added to the toluene solution and stirred for 1 hour to obtain solid particles; the solid particles were washed 5 times with toluene solution, and then the solid particles were dried to a free-flowing state to obtain Catalyst A. Polystyrene is weighed according to polystyrene accounting for 5% of the weight of silicon dioxide, dissolved in toluene, prepared into a homogeneous polymer solution and mixed with the above-mentioned catalyst A to obtain a mixed solution; introduce steam form into the mixed solution n-hexane, so that polystyrene is deposited on the catalyst A, and the introduction rate of n-hexane is 0.05ml / min; after the catalyst A deposited by the polymer is washed 3 times in n-hexane, it is drie...

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Abstract

The invention discloses a preparation method for a mixture of an ethylene-undecylenyl alcohol copolymer and ultrahigh molecular weight polyethylene. The preparation method has the advantages that a co-catalyst of polar monomers and a catalyst is wrapped with a polyethylene microsphere granule, and during polymerization, the composition of a solvent is changed to regulate a solubility parameter of the solvent to further control the swelling rate of polyethylene to control the releasing rate of the co-catalyst of the polar monomers and the catalyst, so that the problem of influence of the polar monomers on the polymerization activity of the ethylene homopolymerization catalyst and a chain transfer process is solved, the polymerization activity of the ethylene homopolymerization catalyst and the molecular weight (more than 1,500,000g / mol) can be effectively ensured, and the mixture of ultrahigh molecular weight polyethylene and the ethylene-undecylenyl alcohol copolymer can be prepared by the in-situ polymerization of ethylene in a single reactor.

Description

technical field [0001] The invention relates to an olefin polymerization reaction process, in particular to a preparation method for a mixture of ethylene-undecenyl alcohol copolymer and ultrahigh molecular weight polyethylene. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) has the characteristics of high strength, low density, good weather resistance, chemical corrosion resistance, low temperature resistance, wear resistance, bending resistance, good cutting resistance, and high specific energy absorption. It is widely used in many fields such as national defense military equipment, aerospace, marine engineering, safety protection, sports equipment, etc. However, the chemical composition of UHMWPE is C and H elements, and the chemically inert UHMWPE makes its surface wettability, adsorption, dyeing and other functional properties poor. Patent DE-OS-4243577 describes a method in which ultra-high molecular weight polyethylene is provided with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F210/02C08F216/02C08F4/14C08F4/70C08L23/06C08L23/08
Inventor 历伟陈涛陈鹏杨华琴
Owner HANGZHOU SHUANGAN SCI TECH
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